Macs are known for their security, but Microsoft has discovered a serious flaw that could let hackers waltz past one of macOS’s strongest defensive tools.
Apple’s macOS operating system has such a strong reputation for security that many people mistakenly believe Macs simply aren’t affected by malware. Well, Microsoft has served up a reminder that that’s not true, as the company has identified a serious vulnerability that affects one of macOS’s most important lines of defense.
In simple terms, Achilles works by bypassing macOS’s Gatekeeper feature. Whenever a user downloads a Mac app, plugin or installer that is not from Apple’s App Store, Gatekeeper checks that it is from a verified developer, is notarized by Apple to be free of malware, and hasn’t been altered. If the app passes those checks, it can run on the user’s Mac. If it fails, Gatekeeper blocks it.
Achilles blocks the assignment of this attribute. That means a malicious file will be able to run on macOS without ever triggering Gatekeeper, thereby side-stepping Apple’s built-in security protections.
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