BlockBlock (beta) for macOS

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Thread author
Staff Member
Jan 8, 2011
Get: BlockBlock (beta) for macOS | Objective-See
Compatibility: OS X 10.9+ (Mavericks)

Malware installs itself persistently, to ensure it's automatically re-executed at reboot. BlockBlock continually monitors common persistence locations and displays an alert whenever a persistent component is added to the OS.

BlockBlock is currently still a beta product. This version isn't as fully tested as Objective-See's other software, and thus may contain bugs. If you find any issues while using this beta, please send an email to and I'll try fix them ASAP!

Technical Details
Though BlockBlock is conceptually simple, it is a rather complex piece of software. BlockBlock is made up of three main components, a kernel extension, a user-mode daemon running as root, and a user-mode agent running as the logged-in user (there can be multiple such agents if BlockBlock is installed for several users on the same system).
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Level 11
Top Poster
Sep 28, 2015
Been using it for quite a while now and can recommend it. Runs smoothly and reports changes immediately.
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