Apple M5 Exploit: Claude Mythos Bypassed macOS Memory Integrity Enforcement in 5 Days
Update, July 1, 2026: The autonomous cyber capability at the center of this story is exactly what later put Mythos in front of regulators. Anthropic shipped a safeguarded Mythos-class model, Claude Fable 5, on June 9; the US government ordered both Fable 5 and Mythos 5 offline on June 12, then lifted the controls on June 30. Fable 5 returned globally on July 1, while Mythos 5 remains gated, now restored to a set of approved US organizations. The government AI model review explainer covers that thread. A three-person security team built the first public Apple M5 exploit in roughly five days, going from an ordinary unprivileged account to a […]
