'This work is a glimpse of what is coming': Security team lays out how Anthropic Mythos helped build a working macOS exploit in five days

Password recovery concept image showing man typing on a keyboard with an overlay imitating password recovery and data recovery principles.

• Calif researchers used Anthropic’s Mythos Preview to chain two bugs and techniques into a macOS kernel exploit on Apple M5
• The exploit bypassed Apple’s new Memory Integrity Enforcement, achieving root shell in five days despite years of Apple investment
• Attack highlights Mythos’ power in surfacing unknown flaws; Apple is reportedly working on a fix

Cybersecurity researchers Calif have explained how they used Anthropic’s (now) famed Mythos Preview AI tool to create a working macOS kernel memory corruption exploit on Apple’s newest M5 silicon, warning their work was a “glimpse of what’s coming” for hardware and software that was built “in a world before Mythos Preview.”