Meta shipped a Mac app for Muse, its personal AI agent, on September 17. The desktop version gives Muse native access to Files, Messages, Calendar, Notes, and Mail on your Mac. It can act directly inside those apps instead of just answering questions in a chat window.
Alexandr Wang, who leads Meta’s AI efforts, announced the release on X. “Your agent can now get stuff done right on your computer — files, messages, calendar, notes, all of it. You’re in control of what it can access, and it always asks before doing anything sensitive,” he wrote.
What the Mac app actually adds
- Native app access: Muse can read and act inside Files, Messages, Calendar, Notes, and Mail on macOS, rather than working through a separate window.
- Opt-in permissions: Meta says access to each app is granted individually, the same model used on the iPhone, Android, and web versions launched on September 8.
- Approval prompts: the app is designed to ask before taking any action Meta classifies as sensitive, such as sending a message or moving a file.
- Download: available free at Meta’s own Muse download page, alongside the iPhone, Android, and web versions.
Handing an AI agent standing access to Mail and Messages is a bigger ask than a chat app that only replies when you type to it. Meta says it isolates Muse’s data in a separate cloud VM, a design we detailed when Muse first launched. That claim still applies to the Mac app. Read our earlier coverage of Muse’s security model for what Meta has published about it so far.
The App Store rank, and the numbers behind it
Muse launched on iPhone, Android, and the web in the US on September 8. By September 10, it had reached the No. 2 spot on Apple’s US free-app chart. That is according to data from the market intelligence firm Sensor Tower, reported by TechCrunch. The ranking came on just over 83,000 iOS downloads in the US.
That number is thin next to Meta’s own launch history. Threads pulled in more than 4.3 million US downloads on its first day. Meta AI, the company’s standalone chatbot app, saw about 108,000 US downloads at launch. ChatGPT, for comparison, topped half a million US installs within its first week. A high chart position mostly reflects how few competing apps launched that same day. It says nothing about how many people are actually using the app, or coming back to it. Meta has not published retention or repeat-usage figures for Muse.
Meta has not announced a rollout timeline for India or other markets outside the US.
Source: TechCrunch, Alexandr Wang
