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Apple announced it will impose new restrictions on macOS 'Full Disk Access' permissions, requiring more explicit user action before granting apps broad access to files, messages, mail, and browsing history. The company says increasingly capable AI agents substantially raise the risk of such extensive access being abused. The change was announced in an update on Friday, October 2, 2026. The move comes weeks after a report found that Meta's Muse AI appeared to know the contents of a user's messages despite not having explicit permission, raising concerns about how AI assistants access private data. Apple's tightened controls are seen as a direct response to that incident and broader worries about AI agents operating with excessive system privileges.