Actively exploited Mac 0-day neutered core OS security defenses



When Apple released the latest version 11.3 for macOS on Monday, it didn’t just introduce support for new features and optimizations. More importantly, the company fixed a zero-day vulnerability that hackers were actively exploiting to install malware without triggering core Mac security mechanisms, some that were in place for more than a decade.


Together, the defenses provide a comprehensive set of protections designed to prevent users from inadvertently installing malware on their Macs. While one-click and even zero-click exploits rightfully get lots of attention, it’s far more common to see trojanized apps that disguise malware as a game, update, or other desirable piece of software.