How to remove WeKnow from Mac (Safari, Chrome, Firefox)

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Written by: Stelian Pilici

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Weknow Search is a browser hijacker that it will change the homepage and search engine for your web browser to http://weknow.ac.

Weknow.ac Redirect MacOS Virus
The Weknow.ac redirect is caused by the “Weknow” browser hijacker which 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 where this software came from.
Browser hijackers are a type of malware created for the purpose of modifying Internet browser settings without the user’s knowledge or consent.

When the Weknow Search browser hijacker is installed, common symptoms include:

  • Changing the web browser’s default homepage to Weknow.ac
  • Changing the browser’s search provider to http://weknow.ac
  • Ability to modify the ‘new tab’ functionality to launch the modified search portal page
  • Loads into the web browser via the Weknow extension or add-on
You should always pay attention when installing software because often, a software installer includes optional installs, such as this Weknow.ac browser hijacker. Be very careful what you agree to install.
Always opt for the custom installation and deselect anything that is not familiar, especially optional software that you never wanted to download and install in the first place. It goes without saying that you should not install software that you don’t trust.

How to remove Weknow.ac redirect (Virus Removal Guide)

This malware removal guide may appear overwhelming due to the amount of the 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.
Please perform all the steps in the correct order. If you have any questions or doubt at any point, STOP and ask for our assistance.
To remove the Weknow.ac redirect, follow these steps:

STEP 1: Remove the Weknow app from macOS

In this first step, we will try to identify and remove any malicious app that might be installed on your device.

  1. Open “Finder”

    Click the Finder application on your dock.
    Click on Finder

  2. Click on “Applications”

    In the Finder left pane, click on “Applications“.
    Click Applications macOS

  3. Find and remove the malicious app.

    The “Applications” screen will be displayed with a list of all the apps installed on your device. Scroll through the list until you find the Weknow app, right-click it, and then click “Move to Trash”.

    The malicious app may have a different name on your device. If you cannot find any malicious apps, you can proceed with the next step

    .
    Find The Malicious App and Remove It

  4. Click “Empty Trash”

    On the dock, right-click on the trash icon and select “Empty Trash”. Doing so deletes the Trash’s contents, including the program that you just sent to the Trash.
    Right-click on Trash and select Empty Trash MacOS

This browser hijackers may create a new group policy for your device, before we proceed with the other steps we need to remove these unwanted changes.

  1. Go to System Preferences.
  2. Click Profiles.
  3. The list will include an item “AdminPrefs“. Select this and click the remove “–” button in the lower left corner.

STEP 2: Uninstall Weknow extension from Safari, Chrome, or Firefox

Safari

  1. Go to Safari’s “Preferences”.

    On the menu bar, click the “Safari” menu and select “Preferences”.
    On the Menu bar Click on Safari then Preference

  2. Check Homepage.

    This will open a new window with your Safari preferences, opened to the “General” tab. Some browser hijackers may change your default homepage, so in the Homepage field make sure its a web page you want to use as your start-up page.

    Change Homepage in Safari

  3. Click “Extensions”

    Next, click on the “Extensions” tab.
    Click on Extensions MacOS

  4. Find and uninstall the malicious extension.

    The “Extensions” screen will be displayed with a list of all the extensions installed on Safari. Scroll through the list until you find the malicious extension, and then click on “Uninstall” to remove it. By default, there are no extensions installed on Safari.

    Known malicious extensions: MacSaver, MacVX (and variants like MacVaX), MacCaptain, MacPriceCut, SaveOnMac, Mac Global Deals or MacDeals, MacSter, MacXcoupon, Shop Brain (or variants like SShoP Braaiin), PalMall, MacShop, MacSmart, News Ticker Remover, Shopper Helper Pro, Photo Zoom, Best YouTube Downloader, ArcadeYum, Extended protection, Video download helper, FlashFree or GoldenBoy.

    The malicious extension may have a different name on your device. If you cannot find any malicious extension, you can proceed with the next step.

    Click on Uninstall to remove malicious extension virus

Google Chrome

Google Chrome has an option that will reset itself to its default settings. Resetting your browser settings will reset the unwanted changes caused by installing other programs. However, your saved bookmarks and passwords will not be cleared or changed.

  1. Click on the three dots at the top right and click “Settings”.

    Click on Chrome’s main menu button, represented by three dots at the top right corner. Now click on the menu option labeled Settings as shown by the arrow in the picture below, which will open the basic settings screen.
    Image - Click on the Chrome menu button then on the Settings button

  2. At the bottom, click “Advanced”.

    Chrome’s “Settings” should now be displayed in a new tab or window, depending on your configuration. Next, scroll to the bottom of the page and click on the “Advanced” link (as seen in the below example).
    Click on the Advanced button MacOS

  3. Under the section “Reset,” click “Reset”.

    Chrome’s advanced settings should now be displayed. Scroll down until the “Reset and clean up” section is visible, as shown in the example below. Next, click on the “Reset settings to their original defaults” button.
    Scroll down and click on the Reset button MacOS

  4. Confirm by clicking “Reset”.

    A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue on with the reset process. To complete the restoration process, click on the “Reset Settings” button.
    Click on Reset Settings to restore Google Chrome to its default settings MacOS

In many cases, changes to Google Chrome may not be fixed with a simple browser reset. In such a case, it will be easier to completely remove Chrome and all data, then reinstall. Before doing this be aware that this will delete all data for all Google apps you have installed, such as your bookmarks, so you will need to export them before doing this.

  1. To completely remove Google Chrome and all its data from your device, on the menu bar, click the Finder icon. Choose Go, click Go to Folder, and then paste one of the below paths into the window that opens.

    /Applications/Chrome.app
    /Library/Application Support/Google/
    /Library/Google/
    ~/Library/Application Support/Google/
    ~/Library/Google/
    ~/Library/Preferences/com.google.Chrome.plist

  2. You will need to delete all of the above items. After deleting all of the above files, restart your device.
  3. You can now download and re-install Google Chrome on your device. You will need to import any exported bookmarks or other data, and may need to reinstall any other Google apps that you use.

Mozilla Firefox

If you’re having problems with Firefox, resetting it can help. 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.

  1. Go to the “Help” menu.

    Click on Firefox’s main menu button, represented by three horizontal lines. When the drop-down menu appears, select the option labeled “Help“.
    Click on the Firefox Menu button then select Help MacOS

  2. Click “Troubleshooting Information”.

    From the Help menu, click on “Troubleshooting Information“.

    If you’re unable to access the “Help” menu, type about:support in your address bar to bring up the Troubleshooting information page.

    Troubleshooting Information option in Firefox MacOS

  3. Click on “Refresh Firefox”

    Click the “Refresh Firefox” button in the upper-right corner of the “Troubleshooting Information” page.
    Click on the Refresh Firefox button MacOS

  4. Confirm.

    To continue, click on the “Refresh Firefox” button in the new confirmation window that opens.
    Click again on Refresh Firefox button macos

  5. Click on “Finish”.

    Firefox will close itself and will revert to its default settings. When it’s done, a window will list the information that was imported. Click on the “Finish“.

Your old Firefox profile will be placed on your desktop in a folder named “Old Firefox Data“. If the reset didn’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’t need this folder any longer, you should delete it as it contains sensitive information.

STEP 3: Use Malwarebytes for Mac to remove Weknow.ac redirect

Malwarebytes is one of the most popular and most used anti-malware apps, and for good reasons. It is able to destroy many types of malware that other software tends to miss, without costing you absolutely nothing. When it comes to cleaning up an infected device, Malwarebytes has always been free and we recommend it as an essential tool in the fight against malware.

The first time you install Malwarebytes, you’re given a free 30-days trial of the premium edition, which includes preventative tools like real-time scanning and specific protection from ransomware. After 30 days, it automatically reverts to the basic free version that will detect and clean up malware infections only when you run a scan.

  1. Download Malwarebytes.

    You can download Malwarebytes by clicking the link below.

    MALWAREBYTES FOR MAC DOWNLOAD LINK
    (The above link will open a new page from where you can download Malwarebytes for Mac)

  2. Double-click on the Malwarebytes setup file.

    When Malwarebytes has finished downloading, double-click on the Malwarebytes-Mac-3.x.y.zzz.pkg file to install Malwarebytes on your device. In most cases, downloaded files are saved to the Downloads folder.
    Double-click on the Malwarebytes setup file Mac

  3. Follow the on-screen prompts to install Malwarebytes.

    When the Malwarebytes installation begins, you will see the Malwarebytes Setup Wizard which will guide you through the installation process. The setup wizard displays an introduction to Malwarebytes for Mac. Click on “Continue” to complete the installation process.

    Malwarebytes for Mac - Install

    Malwarebytes for Mac - Install Part 2

    Next, click on “Install“.

    Malwarebytes for Mac - Install Part 3

    Malwarebytes for Mac - Install Part 4

  4. Click on “Scan Now”.

    Once installed, Malwarebytes will automatically start and update the antivirus database. To perform a system scan, click on the “Scan Now” button.

    Malwarebytes for Mac Scan Now

  5. Wait for the Malwarebytes scan to complete.

    Malwarebytes will now start scanning your Mac for adware and other malicious apps. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
    Malwarebytes for Mac scanning for virus

  6. Click on “Confirm”.

    When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes has detected. To remove the malicious apps that Malwarebytes has found, click on the “Confirm” button.
    Malwarebytes for Mac - Remove Malware
    Malwarebytes will now remove all the malicious files that it has found. To complete the malware removal process, Malwarebytes may ask you to restart your device.

Your macOS shoul be now malware free of the Weknow.ac redirect. If you are still experiencing problems while trying to remove Weknow.ac redirect, please ask for help in our Malware Removal Assistance for Mac forum.

How to Stay Safe Online

Here are 10 basic security tips to help you avoid malware and protect your device:

  1. Use a good antivirus and keep it up-to-date.

    Shield Guide

    It's essential to use a good quality antivirus and keep it up-to-date to stay ahead of the latest cyber threats. We are huge fans of Malwarebytes Premium and use it on all of our devices, including Windows and Mac computers as well as our mobile devices. Malwarebytes sits beside your traditional antivirus, filling in any gaps in its defenses, and providing extra protection against sneakier security threats.

  2. Keep software and operating systems up-to-date.

    updates-guide

    Keep your operating system and apps up to date. Whenever an update is released for your device, download and install it right away. These updates often include security fixes, vulnerability patches, and other necessary maintenance.

  3. Be careful when installing programs and apps.

    install guide

    Pay close attention to installation screens and license agreements when installing software. Custom or advanced installation options will often disclose any third-party software that is also being installed. Take great care in every stage of the process and make sure you know what it is you're agreeing to before you click "Next."

  4. Install an ad blocker.

    Ad Blocker

    Use a browser-based content blocker, like AdGuard. Content blockers help stop malicious ads, Trojans, phishing, and other undesirable content that an antivirus product alone may not stop.

  5. Be careful what you download.

    Trojan Horse

    A top goal of cybercriminals is to trick you into downloading malware—programs or apps that carry malware or try to steal information. This malware can be disguised as an app: anything from a popular game to something that checks traffic or the weather.

  6. Be alert for people trying to trick you.

    warning sign

    Whether it's your email, phone, messenger, or other applications, always be alert and on guard for someone trying to trick you into clicking on links or replying to messages. Remember that it's easy to spoof phone numbers, so a familiar name or number doesn't make messages more trustworthy.

  7. Back up your data.

    backup sign

    Back up your data frequently and check that your backup data can be restored. You can do this manually on an external HDD/USB stick, or automatically using backup software. This is also the best way to counter ransomware. Never connect the backup drive to a computer if you suspect that the computer is infected with malware.

  8. Choose strong passwords.

    lock sign

    Use strong and unique passwords for each of your accounts. Avoid using personal information or easily guessable words in your passwords. Enable two-factor authentication (2FA) on your accounts whenever possible.

  9. Be careful where you click.

    cursor sign

    Be cautious when clicking on links or downloading attachments from unknown sources. These could potentially contain malware or phishing scams.

  10. Don't use pirated software.

    Shady Guide

    Avoid using Peer-to-Peer (P2P) file-sharing programs, keygens, cracks, and other pirated software that can often compromise your data, privacy, or both.

To avoid potential dangers on the internet, it's important to follow these 10 basic safety rules. By doing so, you can protect yourself from many of the unpleasant surprises that can arise when using the web.

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