California team details how Anthropic Mythos helped build a working macOS exploit in five days

Calif says Anthropic’s Mythos Preview helped researchers build a working macOS kernel exploit in five days.

The exploit reportedly achieves local privilege escalation on M5-based Macs running macOS 26.4.1 with Memory Integrity Enforcement enabled.

Researchers say AI sped up bug discovery and technique chaining, even against Apple’s newer hardware-backed protections.

Technical details are being withheld until Apple ships a patch.