Apple tightens Mac Full Disk Access prompts for AI tools amid Meta Muse dispute
In brief
- Apple's macOS updates, announced October 2, 2026, add prompts around Full Disk Access.
- Full Disk Access will require "very explicit user action" to grant, Apple said.
- Columnist Jason Aten said Meta's Muse read his messages; Meta disputed his account.
- The fix doesn't appear to bring iPhone-style sandboxing to the Mac, Crypto Briefing said.
- Apple shares rose about 2% on the day, Crypto Briefing reported.
What changes on the Mac
The core change targets Full Disk Access, a permission that lets an app reach deep into a user's stored data. Apple framed the update around access control (the stated goal is to stop developers from misusing that level of access), and it set a higher bar for switching the permission on.
Apple said granting this permission will now require “very explicit user action.”
Apple argued that as autonomous AI tools grow more capable, the dangers tied to broad data access evolve right alongside them.
The Muse dispute
Meta's Muse AI agent got a Mac app in mid-September 2026, and complaints about its data access surfaced shortly afterward. The most prominent came from technology columnist Jason Aten, who indicated that Muse accessed his private messages even though Full Disk Access hadn't been enabled.
Meta disputed that account. The company said properly reaching Messages data required explicit user permission through two revocable layers: Full Disk Access plus additional connectors. Crypto Briefing presented Apple's update as following those complaints, but that link is the outlet's reading of the timing.
Why the Mac is different
On iOS and iPadOS, apps live under stricter sandboxing rules that keep them walled off from each other's data. macOS has always been looser by design, and Full Disk Access exists because professional and power-user software often needs broad reach.
According to Crypto Briefing's analysis, Apple's fix doesn't appear to import the iPhone's sandbox wholesale onto the Mac; instead, it adds friction and transparency at the point where access is granted. The outlet said any company that wants its agent to operate deeply on a Mac will now have to persuade users through a more deliberate permission process. That's a real change for developers building agent apps on macOS (Meta included).
Apple's shares rose about 2% on the day of the announcement, Crypto Briefing reported.
Frequently asked questions
What is Full Disk Access on macOS?
Full Disk Access is a macOS permission that lets an app reach deep into a user's stored data. It exists because professional and power-user software often needs broad reach. Apple said granting it will now require very explicit user action.
What did Meta say about the Muse data access complaints?
Meta disputed columnist Jason Aten's account that Muse accessed his private messages without Full Disk Access enabled. Meta said properly reaching Messages data required explicit user permission through two revocable layers: Full Disk Access plus additional connectors.
Is Apple bringing iPhone-style sandboxing to the Mac?
Not according to Crypto Briefing. The outlet reported that Apple's fix does not appear to import the iPhone's sandbox wholesale onto the Mac. It adds friction and transparency at the point where access is granted instead.
