{"id":155764,"date":"2022-11-18T18:40:38","date_gmt":"2022-11-18T18:40:38","guid":{"rendered":"https:\/\/malwaretips.com\/blogs\/?p=155764"},"modified":"2022-11-18T18:40:39","modified_gmt":"2022-11-18T18:40:39","slug":"remove-mainsignsearch","status":"publish","type":"post","link":"https:\/\/malwaretips.com\/blogs\/remove-mainsignsearch\/","title":{"rendered":"Remove MainSignSearch From Mac (Virus Removal Guide)"},"content":{"rendered":"<p><strong>MainSignSearch<\/strong> is a potentially unwanted program that injects advertisements into websites you visit and changes your browser&#8217;s default search engine and homepage. MainSignSearch is commonly bundled with other programs that you download from the Internet.<\/p>\n<figure id=\"attachment_155765\" aria-describedby=\"caption-attachment-155765\" style=\"width: 850px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-155765\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/11\/The-MainSignSearch-Adware.jpg\" alt=\"Image: MainSignSearch Mac Adware\" width=\"860\" height=\"611\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/11\/The-MainSignSearch-Adware.jpg 860w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/11\/The-MainSignSearch-Adware-300x213.jpg 300w\" sizes=\"auto, (max-width: 860px) 100vw, 860px\" \/><figcaption id=\"caption-attachment-155765\" class=\"wp-caption-text\">Image: MainSignSearch Mac Adware<\/figcaption><\/figure>\n<p>\u00a0<\/p>\n<figure id=\"attachment_131300\" aria-describedby=\"caption-attachment-131300\" style=\"width: 632px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-131300\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/12\/Installation-Adware-Mac.jpg\" alt=\"Image: MainSignSearch Mac installation\" width=\"642\" height=\"310\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/12\/Installation-Adware-Mac.jpg 642w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/12\/Installation-Adware-Mac-300x145.jpg 300w\" sizes=\"auto, (max-width: 642px) 100vw, 642px\" \/><figcaption id=\"caption-attachment-131300\" class=\"wp-caption-text\">Image: MainSignSearch Mac installation<\/figcaption><\/figure>\n<h2 class=\"mt_title\">What is MainSignSearch?<\/h2>\n<p>MainSignSearch is a malicious program that hijacks your browser homepage and search engine and displays unwanted advertisements not originating from the sites you are browsing. To do this, MainSignSearch uses a browser extension or program.<\/p>\n<p>When installed on a computer, the MainSignSearch browser hijacker will redirect your browser search queries through MainSignSearch Search, which will redirect to search result pages from search.yahoo.com. This is most likely done to generate advertising revenue by using Yahoo Search for its search results.<br \/>MainSignSearch will also open new tabs in the browser that display advertisements trying to sell software, push fake software updates, and tech support scams.<\/p>\n<p>When the MainSignSearch browser hijacker is installed on a computer, common symptoms include:<\/p>\n<ul>\n<li>Your web browser&#8217;s default search engine is MainSignSearch Search<\/li>\n<li>Your browser&#8217;s search queries are redirected through MainSignSearch Search<\/li>\n<li>The &#8220;MainSignSearch&#8221; browser extension or program is installed on your Mac<\/li>\n<\/ul>\n<h2 class=\"mt_title\">How was MainSignSearch installed on my computer?<\/h2>\n<p>MainSignSearch is installed by the users, whether that is knowingly or not. Often, this type of program is offered through advertisements or bundled with other software, leaving the user puzzled about where this software came from.<br \/>Unfortunately, some free downloads do not adequately disclose that other software will also be installed and you may find that you have installed MainSignSearch without your knowledge.<\/p>\n<figure id=\"attachment_131301\" aria-describedby=\"caption-attachment-131301\" style=\"width: 758px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-131301\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/12\/Malicious-Ads-Installing-Mac-Malware-1.jpg\" alt=\"Image: Malicious Ad distributing MainSignSearch\" width=\"768\" height=\"509\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/12\/Malicious-Ads-Installing-Mac-Malware-1.jpg 768w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/12\/Malicious-Ads-Installing-Mac-Malware-1-300x199.jpg 300w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption id=\"caption-attachment-131301\" class=\"wp-caption-text\">Image: Malicious Ads distributing MainSignSearch<\/figcaption><\/figure>\n<p>If you do not know how MainSignSearch was installed or are concerned other extensions or unwanted programs may be installed on your Mac, you can use the removal guide below.<\/p>\n<h2 class=\"mt_title\">Removal instructions for MainSignSearch browser hijacker<\/h2>\n<div class=\"mt_noteb\">This malware removal guide may appear overwhelming due to the number of steps and numerous programs that are being used. We have only written it this way to provide clear, detailed, and easy-to-understand instructions that anyone can use to remove malware for free.<br \/>Please perform all the steps in the correct order. If you have any questions or doubts at any point, stop and <a href=\"https:\/\/malwaretips.com\/categories\/malware-removal-help.9\/\" target=\"_blank\" rel=\"noopener noreferrer\">ask for our assistance<\/a>.<\/div>\n<div class=\"mwt_summary\">To remove MainSignSearch from your Mac, follow these steps:<\/div>\n<ul class=\"stepsbox\">\n<li><a href=\"#profile-mac\">STEP 1: Remove malicious Profiles from your Mac<\/a><\/li>\n<li><a href=\"#uninstall-mac\">STEP 2: Remove MainSignSearch from Mac<\/a><\/li>\n<li><a href=\"#malwarebytes-mac\">STEP 3: Use Malwarebytes for Mac to remove MainSignSearch and other malware<\/a><\/li>\n<li><a href=\"#browser-mac\">STEP 4: Remove MainSignSearch from Safari, Chrome, or Firefox<\/a><\/li>\n<\/ul>\n<h3 id=\"profile-mac\" class=\"mt_blue\">STEP 1: Remove malicious Profiles from your Mac<\/h3>\n<p>Profiles are used by IT admins in businesses to control the behavior of their Macs. These profiles can configure a Mac to do many different things, some of which are not otherwise possible.<br \/>When it comes to home users, adware and browser hijackers are using the configuration profile to prevent users from removing malicious programs from the computer. This also prevents the user from changing that behavior in the browser\u2019s settings.<br \/>In this first step, we will check your computer to see if any configuration profiles are installed. To do this, follow the below steps:<\/p>\n\n\n<ol class=\"wp-block-list\"><li>\n<p class=\"mwt_quick_overview\">Open &#8220;System Settings&#8221;<\/p>\n<p>From the <strong>Apple menu<\/strong> () in the top-left corner of the screen, select <strong>System Settings<\/strong>. (On macOS Monterey and earlier, this is called <strong>System Preferences<\/strong>.)<\/p>\n<\/li><li>\n<p class=\"mwt_quick_overview\">Look for &#8220;Profiles&#8221;<\/p>\n<p>Where you find configuration profiles depends on your version of macOS:<\/p>\n<p><strong>macOS Sequoia (15) and later:<\/strong> click <strong>General<\/strong> in the sidebar, then click <strong>Device Management<\/strong>. You may need to scroll down.<\/p>\n<p><strong>macOS Ventura (13) and Sonoma (14):<\/strong> click <strong>Privacy &amp; Security<\/strong> in the sidebar, then click <strong>Profiles<\/strong> near the bottom.<\/p>\n<p><strong>macOS Monterey (12) and earlier:<\/strong> in System Preferences, click <strong>Profiles<\/strong>.<\/p>\n<p>You can also type &#8220;Profiles&#8221; in the search box.<\/p>\n<div class=\"mt_noteb\"><strong>No profiles listed, or no Profiles section at all?<\/strong> That means no configuration profiles are installed on your Mac, which is completely normal. Skip ahead to the next step of this guide.<\/div>\n<\/li><li>\n<p class=\"mwt_quick_overview\">Remove the malicious profiles<\/p>\n<p>Malware uses configuration profiles to lock your browser settings \u2014 forcing a fake search engine or homepage on you and preventing you from changing it back. If you see a profile you don&#8217;t recognize (and your Mac isn&#8217;t managed by your workplace or school), select it, press the <strong>\u2212 (minus)<\/strong> button, and click <strong>Remove<\/strong> to confirm.<br \/><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-101808 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Malicious-Profile.jpg\" alt=\"Remove malicious profiles from your Mac\" width=\"700\" height=\"458\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Malicious-Profile.jpg 700w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Malicious-Profile-300x196.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<\/li><\/ol>\n\n\n<h3 id=\"uninstall-mac\" class=\"mt_blue\">STEP 2: Remove MainSignSearch from Mac<\/h3>\n<p>In this next step, we will uninstall MainSignSearch and remove its files from your computer. Sometimes the MainSignSearch browser hijacker can have a usable Uninstall entry that can be used to remove it.<\/p>\n<ol class=\"mwt_detailed_steps_tab\">\n<li>\n<p class=\"mwt_quick_overview\">Quit &#8220;MainSignSearch&#8221;<\/p>\n<p>On the Apple menu bar, in the top-right corner, if you see the MainSignSearch icon, click on it and then select <strong>Quit<\/strong>.<\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Open &#8220;Finder&#8221;<\/p>\n<p>Click the <strong>Finder<\/strong> application on your dock.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98743 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Open-Finder.jpg\" alt=\"Open Finder\" width=\"650\" height=\"213\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Open-Finder.jpg 650w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Open-Finder-300x98.jpg 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Click on &#8220;Applications&#8221;<\/p>\n<p>In the Finder left pane, click on &#8220;<strong>Applications<\/strong>&#8220;.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98729 alignnone\" title=\"Click on Applications\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Mac-Click-Applications.jpg\" alt=\"Click on Applications\" width=\"750\" height=\"425\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Mac-Click-Applications.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Mac-Click-Applications-300x170.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Find and remove MainSignSearch.<\/p>\n<p>The <em>&#8220;Applications&#8221;<\/em> screen will be displayed with a list of all the apps installed on your device. Scroll through the list until you find <strong>MainSignSearch<\/strong>, right-click it, and then click <strong>&#8220;Move to Trash&#8221;<\/strong>.<\/p>\n<div class=\"mt_notey\">\n<p>There may be other malicious programs installed on your Mac. Look out for any suspicious program that could be behind all the drama \u2013 anything you don\u2019t remember downloading or that doesn\u2019t sound like a genuine program.<\/p>\n<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98730 alignnone\" title=\"Find MainSignSearch and Move it to Trash\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Mac-Move-To-Trash-Application.jpg\" alt=\"Find MainSignSearch and Remove It\" width=\"750\" height=\"426\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Mac-Move-To-Trash-Application.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Mac-Move-To-Trash-Application-300x170.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Remove MainSignSearch files<\/p>\n<ol>\n<li>Click the desktop to make sure you\u2019re in the <strong>Finder<\/strong>, choose &#8220;<strong>Go<\/strong>&#8221; then click on &#8220;<strong>Go to Folder<\/strong>&#8220;.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-101804 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Go-to-folder-Mac.jpg\" alt=\"Go to Folder mac\" width=\"700\" height=\"439\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Go-to-folder-Mac.jpg 700w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Go-to-folder-Mac-300x188.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/li>\n<li>Type or copy\/paste each of the below paths into the window that opens, then click <strong>Go<\/strong>.\n<ul>\n<li><strong>\/Library\/LaunchAgents\/<\/strong><\/li>\n<li><strong>~\/Library\/LaunchAgents\/<\/strong><\/li>\n<li><strong>\/Library\/Application Support\/<\/strong><\/li>\n<li><strong>~\/Library\/Application\/<\/strong><\/li>\n<li><strong>\/Library\/LaunchDaemons\/<\/strong><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-101805 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Library-folders.jpg\" alt=\"Type the commands in the Go to Folder window\" width=\"700\" height=\"308\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Library-folders.jpg 700w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2020\/01\/Library-folders-300x132.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<\/li>\n<li>In each of these folders, search for any recently-added suspicious files and move them to the Trash. Usually the name of theses files will contain &#8220;MainSignSearch&#8221;, similar to these : &#8220;com.MainSignSearch.plist&#8221; &#8220;installmac.AppRemoval.plist\u201d, &#8220;myppes.download.plist&#8221;, &#8220;mykotlerino.ltvbit.plist&#8221;, or &#8220;com.myppes.net-preferences.plist&#8221;.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p>Now that we\u2019ve uninstalled MainSignSearch, in the next step we will scan your computer for any infections, adware, or potentially unwanted programs that may be present on your device.<\/p>\n<h3 id=\"malwarebytes-mac\" class=\"mt_blue\">STEP 3: Use Malwarebytes for Mac to remove MainSignSearch and other malware<\/h3>\n<p>In this third step, we will download, install and run a scan with Malwarebytes for Mac to remove MainSignSearch and other malware from your Mac.<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Malwarebytes for Mac<\/strong> is a free on-demand scanner that removes the malware other security software tends to miss \u2014 adware, browser hijackers, and unwanted programs included. Cleaning an infected Mac with Malwarebytes has always been completely free, and it&#8217;s our go-to recommendation. Follow the steps below to scan your Mac and remove what Malwarebytes finds.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\n<p class=\"mwt_quick_overview\">Download Malwarebytes for Mac<\/p>\n<p>Click the button below to download the latest version of <strong>Malwarebytes for Mac<\/strong>.<\/p>\n<div class=\"mwt_download_box mwt_cta\"><div class=\"mwt_cta_head\"><img loading=\"lazy\" decoding=\"async\" class=\"mwt_product_icon_logo\" width=\"40\" height=\"40\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/06\/Malwarebytes-LOGO.png\" alt=\"Malwarebytes logo\" title=\"\"><div><span class=\"mwt_cta_title\">Malwarebytes Free for Mac<\/span><span class=\"mwt_cta_sub\">Scans and removes malware at no cost<\/span><\/div><\/div><a class=\"mwt_cta_btn\" data-google-vignette=\"false\" href=\"https:\/\/malwaretips.com\/download-malwarebytes-for-mac\" onclick=\"window.open('https:\/\/malwaretips.com\/get\/malwarebytes-mac','_blank','noopener');\">Download Malwarebytes<\/a><span class=\"mwt_cta_note\">Official installer for macOS. Your download starts right away.<\/span><a class=\"mwt_cta_more\" data-google-vignette=\"false\" href=\"https:\/\/malwaretips.com\/get\/malwarebytes-mac-premium\" target=\"_blank\" rel=\"noopener sponsored\">Want real-time protection? See Malwarebytes Premium<\/a><\/div>\n<\/li>\n\n\n\n<li>\n<p class=\"mwt_quick_overview\">Open the Malwarebytes setup file<\/p>\n<p>When the download finishes, open your <em>Downloads<\/em> folder and <strong>double-click the setup file<\/strong> to begin the installation.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98734 alignnone\" title=\"Double-click on setup file to install Malwarebytes\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer.jpg\" alt=\"Double-click on setup file to install Malwarebytes\" width=\"750\" height=\"424\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-300x170.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure><p><\/p>\n<\/li>\n\n\n\n<li>\n<p class=\"mwt_quick_overview\">Follow the On-Screen Prompts to Install Malwarebytes<\/p>\n<p>The <em>Malwarebytes for Mac Installer<\/em> will guide you through a few quick screens. Click &#8220;<strong>Continue<\/strong>&#8221; and keep following the prompts until the installation completes.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98735 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-1.jpg\" alt=\"Click Continue to install Malwarebytes for Mac\" width=\"750\" height=\"532\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-1.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-1-300x213.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure><p><\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98736 alignnone\" title=\"Click again on Continue to install Malwarebytes for Mac for Mac\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-2.jpg\" alt=\"Click again on Continue to install Malwarebytes for Mac\" width=\"750\" height=\"531\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-2.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-2-300x212.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure><p><\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98737 alignnone\" title=\"Click Install to install Malwarebytes on Mac\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-4.jpg\" alt=\"Click Install to install Malwarebytes on Mac\" width=\"750\" height=\"531\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-4.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Installer-Step-4-300x212.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure><p><\/p>\n<p>When the installation is complete, Malwarebytes opens to the <em>Welcome to Malwarebytes<\/em> screen. Click &#8220;<strong>Get started<\/strong>&#8220;.<\/p>\n<p>Malwarebytes needs <strong>Full Disk Access<\/strong> to check your whole Mac. When it asks, open <strong>System Settings &gt; Privacy &amp; Security &gt; Full Disk Access<\/strong>, turn on <strong>Malwarebytes<\/strong> (it may be listed as Malwarebytes Protection), and confirm with your password or Touch ID. Then return to Malwarebytes. On macOS Monterey and earlier, this setting is in System Preferences &gt; Security &amp; Privacy &gt; Privacy.<\/p>\n<\/li>\n\n\n\n<li>\n<p class=\"mwt_quick_overview\">Select &#8220;Personal Computer&#8221; or &#8220;Work Computer&#8221;<\/p>\n<p>Malwarebytes will ask what type of computer you&#8217;re installing it on. Click either <strong>Personal Computer<\/strong> or <strong>Work Computer<\/strong>, whichever applies.<br \/><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98740 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Select-Personal-Computer.jpg\" alt=\"Select Personal Computer or Work Computer mac\" width=\"750\" height=\"537\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Select-Personal-Computer.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Select-Personal-Computer-300x215.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/li>\n\n\n\n<li>\n<p class=\"mwt_quick_overview\">Start the Scan<\/p>\n<p>Click the &#8220;<strong>Scan<\/strong>&#8221; button. Malwarebytes will automatically update its detection database and begin checking your Mac for malware.<br \/><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98733 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Click-Scan.jpg\" alt=\"Click on Scan button to start a system scan Mac\" width=\"750\" height=\"538\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Click-Scan.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Click-Scan-300x215.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/li>\n\n\n\n<li>\n<p class=\"mwt_quick_overview\">Wait for the Scan to Finish<\/p>\n<p>Malwarebytes will scan your Mac for adware, browser hijackers, and other malicious programs. This can take a few minutes, so feel free to do something else \u2014 just check back occasionally to see the progress.<br \/><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98739 alignnone\" title=\"Wait for Malwarebytes for Mac to scan your computer\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Scanning-for-malware.jpg\" alt=\"Wait for Malwarebytes for Mac to scan for malware\" width=\"750\" height=\"536\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Scanning-for-malware.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Scanning-for-malware-300x214.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/li>\n\n\n\n<li>\n<p class=\"mwt_quick_overview\">Quarantine the Detected Threats<\/p>\n<p>When the scan is done, you&#8217;ll see a list of everything Malwarebytes found. Click the &#8220;<strong>Quarantine<\/strong>&#8221; button to remove all the threats at once.<br \/><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-98732 alignnone\" title=\"Review the malicious programs and click on Quarantine\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Click-Confirm.jpg\" alt=\"Review the malicious programs and click on Quarantine to remove malware\" width=\"750\" height=\"538\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Click-Confirm.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Click-Confirm-300x215.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/li>\n\n\n\n<li> <p class=\"mwt_quick_overview\">Restart Your Mac<\/p> <p>Malwarebytes will now remove all the malicious files it found. Some threats can only be fully removed after a reboot \u2014 if Malwarebytes asks you to restart, allow it. Once you&#8217;re logged back in, check whether the problems you noticed have stopped. If they come back, save the scan report and ask for help in our forum.<br \/><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"536\" class=\"size-full wp-image-98738 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Restart.jpg\" alt=\"Malwarebytes For Mac requesting to restart computer\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Restart.jpg 750w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2019\/11\/Malwarebytes-Mac-Restart-300x214.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><br \/><\/p> <\/li>\n<\/ol>\n\n\n<h3 id=\"browser-mac\" class=\"mt_blue\">STEP 4: Remove MainSignSearch from Safari, Chrome, or Firefox<\/h3>\n<p>In this final step, we will restore your browser settings back to their default configuration to remove spam notifications, malicious extensions, and unwanted browser settings.<br \/>\nPlease note that this method will remove all extensions, toolbars, and other customizations but will leave your bookmarks and favorites intact. For each browser that you have installed on your computer, please click on the browsers tab below and follow the displayed steps to reset that browser..<\/p>\n<div class=\"su-tabs mwtcui-tabs \" data-mwt-tabs data-active=\"1\" data-anchor-in-url=\"no\"><div class=\"su-tabs-nav\" role=\"tablist\" aria-label=\"Instructions\"><button type=\"button\" class=\"\" role=\"tab\" id=\"mwtcui-tabs-1-0-tab\" aria-controls=\"mwtcui-tabs-1-0\" aria-selected=\"true\" tabindex=\"0\" data-anchor=\"\">Safari Browser<\/button><button type=\"button\" class=\"\" role=\"tab\" id=\"mwtcui-tabs-1-1-tab\" aria-controls=\"mwtcui-tabs-1-1\" aria-selected=\"false\" tabindex=\"-1\" data-anchor=\"\">Chrome for Mac Browser<\/button><button type=\"button\" class=\"\" role=\"tab\" id=\"mwtcui-tabs-1-2-tab\" aria-controls=\"mwtcui-tabs-1-2\" aria-selected=\"false\" tabindex=\"-1\" data-anchor=\"\">Firefox for Mac Browser<\/button><\/div><div class=\"su-tabs-panes\"><div class=\"su-tabs-pane mwtcui-tab-panel \" id=\"mwtcui-tabs-1-0\" role=\"tabpanel\" aria-labelledby=\"mwtcui-tabs-1-0-tab\" data-title=\"Safari Browser\" data-anchor=\"\">\n<h4>Remove MainSignSearch browser hijacker from Safari<\/h4>\n<p>To remove the MainSignSearch browser hijacker from Safari we will check if there are any malicious extensions installeded on your browser and what settings have been changed by this malicious program.<\/p>\n<ol class=\"mwt_detailed_steps_tab\">\n<li>\n<p class=\"mwt_quick_overview\">Go to Safari&#8217;s &#8220;Preferences&#8221;.<\/p>\n<p>On the menu bar, click the &#8220;Safari&#8221; menu and select &#8220;Preferences&#8221;.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-84126 alignnone\" title=\"Click on Safari then Preferences\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Safari-Preferences.jpg\" alt=\"On the Menu bar Click on Safari then Preference\" width=\"650\" height=\"334\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Safari-Preferences.jpg 650w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Safari-Preferences-300x154.jpg 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Check Homepage.<\/p>\n<p>This will open a new window with your Safari preferences, opened to the &#8220;<em>General<\/em>&#8221; tab. Some browser hijackers may change your default homepage, so in the <em>Homepage<\/em>&nbsp;field make sure it&#8217;s a web page you want to use as your start-up page.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-84114 alignnone\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Change-Homepage.jpg\" alt=\"Change Homepage in Safari\" width=\"650\" height=\"418\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Change-Homepage.jpg 650w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Change-Homepage-300x193.jpg 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Click &#8220;Extensions&#8221;<\/p>\n<p>Next, click on the &#8220;<strong>Extensions<\/strong>&#8221; tab.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-84119 alignnone\" title=\"Click on Extensions\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Click-Extensions.jpg\" alt=\"Click on Extensions MacOS\" width=\"650\" height=\"418\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Click-Extensions.jpg 650w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Click-Extensions-300x193.jpg 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Find and uninstall MainSignSearch.<\/p>\n<p>The <em>&#8220;Extensions&#8221;<\/em>&nbsp;screen will be displayed with a list of all the extensions installed on Safari. Scroll through the list until you find the <strong>MainSignSearch<\/strong> extension, and then click on <strong>&#8220;Uninstall&#8221;<\/strong> to remove it.<\/p>\n<div class=\"mt_noter\">There may be other malicious extensions installed. Look out for any suspicious browser extension that could be behind all the drama \u2013 anything you don\u2019t remember downloading or that doesn\u2019t sound like a genuine extension. By default, there are no extensions installed on Safari so it&#8217;s safe to remove any extension.<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-84125 alignnone\" title=\"Click on Uninstall to remove MainSignSearch\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Remove-malicious-extensions-Safari.jpg\" alt=\"Click on Uninstall to remove MainSignSearch\" width=\"650\" height=\"339\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Remove-malicious-extensions-Safari.jpg 650w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/08\/Remove-malicious-extensions-Safari-300x156.jpg 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Remove spam notifications ads<\/p>\n<p>Click <strong>Preferences<\/strong>, click <strong>Websites<\/strong>, then click <strong>Notifications<\/strong>. Deselect \u201c<em>Allow websites to ask for permission to send push notifications<\/em>\u201d.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-130285\" title=\"Deselect Allow websites to ask for permission to send push notifications\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/11\/Deny-Notifications-Safari.png\" alt=\"Deselect Allow websites to ask for permission to send push notifications\" width=\"800\" height=\"646\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/11\/Deny-Notifications-Safari.png 800w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2021\/11\/Deny-Notifications-Safari-300x242.png 300w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Remove all data stored by websites on your computer.<\/p>\n<p>In the Safari menu, choose &#8220;Preferences&#8230;&#8221;, select &#8220;<strong>Privacy<\/strong>&#8221; at the top of the new window that appears, and then click the &#8220;Manage Website Data&#8221; button.<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Manage-Website-Data.png\" alt=\"Click Manage Website Data\" width=\"800\" height=\"393\" class=\"alignnone size-full wp-image-151104\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Manage-Website-Data.png 800w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Manage-Website-Data-300x147.png 300w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>In the next dialog box, click &#8220;<strong>Remove All<\/strong>&#8220;. It will ask you if you are sure you want to remove all data stored by websites on your computer. Select &#8220;<strong>Remove Now<\/strong>&#8221; to clear data that could be used to track your browsing.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Remove-All-Website-Data.png\" alt=\"Click Remove All Website Data\" width=\"800\" height=\"533\" class=\"alignnone size-full wp-image-151105\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Remove-All-Website-Data.png 800w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Remove-All-Website-Data-300x200.png 300w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<\/li>\n<li>\n<p class=\"mwt_quick_overview\">Empty Safari Caches.<\/p>\n<p>From your Safari menu bar, click <strong>Safari<\/strong> and select <strong>Preferences<\/strong>, then select the <strong>Advanced<\/strong> tab. Enable the checkbox to &#8220;<strong>Show Develop menu in menu bar<\/strong>&#8220;.<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Show-Dev-Bar.png\" alt=\"Show Dev Bar\" width=\"800\" height=\"438\" class=\"alignnone size-full wp-image-151106\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Show-Dev-Bar.png 800w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/Show-Dev-Bar-300x164.png 300w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>From the menu bar select <strong>Develop<\/strong>, then click on <strong>Empty Caches<\/strong> as seen in the image below.<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/empty-cache.png\" alt=\"empty cache\" width=\"421\" height=\"470\" class=\"alignnone size-full wp-image-151107\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/empty-cache.png 421w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2022\/10\/empty-cache-269x300.png 269w\" sizes=\"auto, (max-width: 421px) 100vw, 421px\" \/><\/p>\n<\/li>\n<\/ol>\n<\/div><div class=\"su-tabs-pane mwtcui-tab-panel \" id=\"mwtcui-tabs-1-1\" role=\"tabpanel\" aria-labelledby=\"mwtcui-tabs-1-1-tab\" data-title=\"Chrome for Mac Browser\" data-anchor=\"\">\n<h4>Remove MainSignSearch browser hijacker from Chrome for Mac<\/h4>\n<p>To remove the MainSignSearch browser hijacker from Chrome for Mac we will reset the browser settings to its default. Doing these steps will erase all configuration information from Chrome such as your home page, tab settings, saved form information, browsing history, and cookies. This process will also disable any installed extensions. All of your bookmarks, though, will be preserved.<\/p>\n\n<ol>\n \t<li>\n<p class=\"mwt_quick_overview\">Click on the three dots at the top right and go to Settings.<\/p>\nClick on Chrome&#8217;s main menu button, represented by three dots at the top right corner. Now click on the menu option labeled <strong>Settings<\/strong>, which will open the basic settings screen, as shown by the numbered box in the picture below.\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-settings-page-2026-annotated.webp\" alt=\"Google Chrome Settings screen (signed out) with the Settings title highlighted (1); the left sidebar lists You and Google down to Reset settings and About Chrome\" class=\"wp-image-439441\" width=\"800\" height=\"714\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-settings-page-2026-annotated.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-settings-page-2026-annotated-300x268.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-settings-page-2026-annotated-1024x915.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-settings-page-2026-annotated-1536x1372.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/li>\n \t<li>\n<p class=\"mwt_quick_overview\">In the left sidebar, click on the &#8220;Reset settings&#8221; option.<\/p>\nIn the left sidebar, click on &#8220;<strong>Reset settings<\/strong>&#8220;.\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-settings-sidebar-2026-annotated.webp\" alt=\"Google Chrome Settings, lower part of the left sidebar: Reset settings is highlighted (1) between System and Extensions\" class=\"wp-image-439442\" width=\"800\" height=\"517\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-settings-sidebar-2026-annotated.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-settings-sidebar-2026-annotated-300x194.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-settings-sidebar-2026-annotated-1024x662.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-settings-sidebar-2026-annotated-1536x993.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/li>\n \t<li>\n<p class=\"mwt_quick_overview\">Click \u201cRestore settings to their original defaults\u201d.<\/p>\nNow click on <strong>\u201cRestore settings to their original defaults\u201d<\/strong> as shown in the image below.\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-restore-original-defaults-2026-annotated.webp\" alt=\"Google Chrome Reset settings page: the Restore settings to their original defaults row is highlighted (1)\" class=\"wp-image-439443\" width=\"800\" height=\"343\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-restore-original-defaults-2026-annotated.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-restore-original-defaults-2026-annotated-300x129.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-restore-original-defaults-2026-annotated-1024x439.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-restore-original-defaults-2026-annotated-1536x659.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/li>\n \t<li>\n<p class=\"mwt_quick_overview\">Click &#8220;Reset settings&#8221; button.<\/p>\nA confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue with the reset process. To complete the restoration process, click on the &#8220;<strong>Reset settings<\/strong>&#8221; button.\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-confirm-2026-annotated.webp\" alt=\"Google Chrome Reset settings? confirmation dialog listing what the reset does, with the blue Reset settings button highlighted (1)\" class=\"wp-image-439444\" width=\"800\" height=\"564\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-confirm-2026-annotated.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-confirm-2026-annotated-300x212.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-confirm-2026-annotated-1024x722.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/chrome-reset-confirm-2026-annotated-1536x1083.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/li>\n \t<li>\n<p class=\"mwt_quick_overview\">(<em>Optional<\/em>) Stop sync from bringing the problem back.<\/p>\nIf a malicious extension or setting comes back after the reset, Chrome sync may be restoring it from your Google Account. Open Chrome <strong>Settings &gt; You and Google<\/strong>. If you see <strong>Sync and Google services &gt; Manage what you sync<\/strong>, choose <strong>Customize sync<\/strong> and turn off <strong>Settings<\/strong> and <strong>Extensions<\/strong>. In newer versions of Chrome, click your account name, then <strong>Choose what to save in your Google Account<\/strong>, and turn off the same two items. Then remove the unwanted extension again.\n<div class=\"mt_noter\">Don&#8217;t use the &#8220;Delete data&#8221; or &#8220;Clear data&#8221; option on your Google Account&#8217;s Chrome data page to fix this. It deletes the Chrome data saved in your Google Account, such as synced bookmarks, passwords, and history, and you don&#8217;t need it to remove an extension.<\/div><\/li>\n<\/ol>\n\n<\/div><div class=\"su-tabs-pane mwtcui-tab-panel \" id=\"mwtcui-tabs-1-2\" role=\"tabpanel\" aria-labelledby=\"mwtcui-tabs-1-2-tab\" data-title=\"Firefox for Mac Browser\" data-anchor=\"\">\n<h4>Remove MainSignSearch browser hijacker from Firefox for Mac<\/h4>\n<p>To remove the MainSignSearch browser hijacker from Firefox for Mac we will reset the browser settings to its default. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks, passwords, web form auto-fill information, browsing history, and open tabs.<\/p>\n\n\n<ol class=\"wp-block-list\"><li>\n<p class=\"mwt_quick_overview\">Go to the &#8220;Help and Report&#8221; menu.<\/p>\n<p>Click on Firefox&#8217;s main menu button, represented by three horizontal lines. When the drop-down menu appears, select the option labeled &#8220;<strong>Help and Report<\/strong>&#8220;.<\/p>\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-menu-button-2026-mac-annotated.webp\" alt=\"Right end of the Firefox toolbar: the three-line main menu button is highlighted (1), to the right of the extensions and account buttons\" class=\"wp-image-439449\" width=\"800\" height=\"262\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-menu-button-2026-mac-annotated.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-menu-button-2026-mac-annotated-300x98.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-menu-button-2026-mac-annotated-1024x335.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-menu-button-2026-mac-annotated-1536x503.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/li><li>\n<p class=\"mwt_quick_overview\">Click &#8220;More troubleshooting information&#8221;.<\/p>\n<p>Next click on the &#8220;<strong>More troubleshooting information<\/strong>&#8221; option. This opens the Troubleshooting Information page, as shown by the numbered box in the image below. You can also open it by typing <strong>about:support<\/strong> in the address bar.<\/p>\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-troubleshooting-page-2026-mac-annotated-v2.webp\" alt=\"Top of Firefox&#039;s Troubleshooting Information page, the page that about:support opens, with the page title highlighted (1)\" class=\"wp-image-439503\" width=\"800\" height=\"402\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-troubleshooting-page-2026-mac-annotated-v2.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-troubleshooting-page-2026-mac-annotated-v2-300x151.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-troubleshooting-page-2026-mac-annotated-v2-1024x515.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-troubleshooting-page-2026-mac-annotated-v2-1536x773.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><p><\/p>\n<\/li><li>\n<p class=\"mwt_quick_overview\">Click on &#8220;Refresh Firefox&#8221;<\/p>\n<p>Click the&nbsp;&#8220;<strong>Refresh Firefox<\/strong>&#8221;&nbsp;button in the &#8220;<em>Give Firefox a tune up<\/em>&#8221; box in the upper-right corner of the &#8220;<em>Troubleshooting Information<\/em>&#8221; page.<\/p>\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-button-2026-mac-annotated.webp\" alt=\"Give Firefox a tune up box in the upper-right corner of Firefox&#039;s Troubleshooting Information page, with Refresh Firefox\u2026 highlighted (1)\" class=\"wp-image-439451\" width=\"800\" height=\"370\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-button-2026-mac-annotated.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-button-2026-mac-annotated-300x139.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-button-2026-mac-annotated-1024x474.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-button-2026-mac-annotated-1536x711.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/li><li>\n<p class=\"mwt_quick_overview\">Confirm.<\/p>\n<p>To continue, click on the &#8220;<strong>Refresh Firefox<\/strong>&#8221;&nbsp;button in the new confirmation window that opens.<\/p>\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-confirm-2026-mac-annotated.webp\" alt=\"Firefox confirmation window asking to refresh Firefox to its default settings, with the Refresh Firefox button highlighted (1) next to Cancel\" class=\"wp-image-439452\" width=\"800\" height=\"342\" style=\"width:800px;height:auto\" title=\"\" srcset=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-confirm-2026-mac-annotated.webp 1600w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-confirm-2026-mac-annotated-300x128.webp 300w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-confirm-2026-mac-annotated-1024x438.webp 1024w, https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2026\/11\/firefox-refresh-confirm-2026-mac-annotated-1536x657.webp 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/li><li>\n<p class=\"mwt_quick_overview\">Click on &#8220;Finish&#8221;.<\/p>\n<p>Firefox will close itself and will revert to its default settings. When it&#8217;s done, a window will list the information that was imported. Click on the &#8220;<strong>Finish<\/strong>&#8220;.<\/p>\n<\/li><\/ol>\n\n\n\n<div class=\"mt_noteb\">Your old Firefox profile will be placed on your desktop in a folder named &#8220;<em>Old Firefox Data<\/em>&#8220;. If the reset didn&#8217;t fix your problem you can restore some of the information not saved by copying files to the new profile that was created. If you don&#8217;t need this folder any longer, you should delete it as it contains sensitive information.<\/div>\n\n\n<\/div><\/div><\/div>\n\n\n\n\n<p>Your computer should now be free of the MainSignSearch browser hijacker and other malware.<\/p>\n\n\n<div class=\"mwt_download_box mwt_cta mwt_protect\"><div class=\"mwt_cta_head\"><img loading=\"lazy\" decoding=\"async\" class=\"mwt_product_icon_logo\" width=\"40\" height=\"40\" src=\"https:\/\/malwaretips.com\/blogs\/wp-content\/uploads\/2018\/06\/Malwarebytes-LOGO.png\" alt=\"Malwarebytes logo\" title=\"\"><div><span class=\"mwt_cta_title\">Keep your Mac protected<\/span><span class=\"mwt_cta_sub\">Stop the next infection before it starts<\/span><\/div><\/div><span class=\"mwt_protect_text\">If your Mac got infected, its built-in protection may not be enough on its own. Malwarebytes Premium for Mac adds real-time protection that blocks malware and adware before they can infect your Mac.<\/span><a class=\"mwt_cta_btn\" data-google-vignette=\"false\" href=\"https:\/\/malwaretips.com\/get\/malwarebytes-mac-premium\" target=\"_blank\" rel=\"noopener sponsored\">See Malwarebytes Premium<\/a><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">If you are still experiencing problems while trying to remove a malicious program from your computer, please ask for help in our <strong><a title=\"Mac Malware Removal Help &amp; Support\" href=\"https:\/\/malwaretips.com\/forums\/mac-malware-removal-help-support.183\/\" target=\"_blank\" rel=\"noopener noreferrer\">Mac Malware Removal Help &amp; Support<\/a><\/strong> forum.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MainSignSearch is a potentially unwanted program that injects advertisements into websites you visit and changes your browser&#8217;s default search engine and homepage. MainSignSearch is commonly bundled with other programs that you download from the Internet. &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Remove MainSignSearch From Mac (Virus Removal Guide)\" class=\"read-more button\" href=\"https:\/\/malwaretips.com\/blogs\/remove-mainsignsearch\/#more-155764\" aria-label=\"Read more about Remove MainSignSearch From Mac (Virus Removal Guide)\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":155765,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2725],"tags":[],"class_list":["post-155764","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-adware","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","resize-featured-image"],"_links":{"self":[{"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/posts\/155764","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/comments?post=155764"}],"version-history":[{"count":0,"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/posts\/155764\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/media\/155765"}],"wp:attachment":[{"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/media?parent=155764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/categories?post=155764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/malwaretips.com\/blogs\/wp-json\/wp\/v2\/tags?post=155764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}