BlockBlock – real-time protection against persistent installs on macOS.

Malware often works by installing itself somewhere it can run automatically every time you start your Mac. BlockBlock watches those locations continuously and alerts you the moment anything tries to install itself persistently — before it becomes a problem.

Key Features:

• Real-Time Monitoring: Watches key system locations continuously and alerts you to any new persistent installs.
• Instant Alerts: Get a notification the moment something tries to install itself — approve or block it on the spot.
• VirusTotal Integration: Automatically checks new items against VirusTotal to help identify known threats.
• Lightweight: Runs quietly in the background without slowing down your Mac.
• Open Source: Built by Objective-See, the same trusted developer behind LuLu and KnockKnock.
• Free Forever: No subscription, no trial period, no paid upgrade.