Muse for Mac is a desktop app from Meta. It can organize files, fill in forms, and pull from Messages, Calendar, and Notes, but only after you allow it. macOS holds those permissions, not a switch buried on this website.
Download it from Meta’s download page, the button labeled Download for macOS. There is no Windows app on that page. On a Windows computer, usemuse.ai in the browser.
Install and sign in
- Open the download page on the Mac and choose Download for macOS.
- Install the app the way you install any other Mac download, and open it.
- Sign in with a Meta account. You can create that account from Facebook, Instagram, email, or a phone number.
- You still need to be somewhere Muse is offered. Meta says that is the US and Canada, age 18 and over.
Chat works the same way as on the phone. You land in a conversation, you describe the job, and you can follow up without starting over.Meta’s getting-started guide covers that pattern.
What the Mac app can touch
Meta’s Mac help is specific. To let the agent use the computer, macOS can ask for:
- Full Disk Access, so it can find, read, or update files. The permission covers the disk. Meta says the agent is supposed to use only the files and app information you ask it to work with.
- Automation, so it can act in apps that keep information on the Mac, such as sending a message or deleting a note.
- Notifications, so it can tell you when a task is finished.
During setup, apps that store information locally, such as messages, notes, and mail, can be set one by one:
- Off. The agent cannot use what that app keeps on the Mac.
- Read only. It can read when you ask, and it cannot act in the app.
- Read and interact. It can read and take actions, such as sending a message.
You can turn an app off later in Settings. Meta also says it does not review the other apps on your Mac. If Muse shares something with one of them, that app’s own privacy policy applies.
A reasonable first week is read only, on one app, for one kind of question. “Summarize last week’s notes” does not need permission to send messages.
A first Mac task that stays small
- Leave Automation off until you have seen a read-only answer you trust.
- Ask for something easy to check: “List the titles of the notes I edited this week. Do not change them.”
- Compare the list with Notes yourself.
- Only then decide whether a later task may move or edit files.
Meta’s example of a file job is pulling three invoices from last month into one folder. That is a real change to the disk. Ask for a list of the files first if you want to see the set before anything is moved.
If the Mac app refuses
- It cannot see a file. Full Disk Access is probably off, or that app is set to Off. Change it in macOS settings, not by reinstalling blindly.
- It read something and then sent it. That app was set to Read and interact. Switch it to Read only or Off, and say in the chat that sending is not allowed.
- No notification when a job finishes. Notifications for Muse may be off in macOS.
- You wanted this on a PC. Use the website. Meta’s download page does not offer a Windows build.
Questions about the Mac app
Does Full Disk Access mean Meta reads my whole computer?
The permission is broad, because that is how macOS grants it. Meta’s help says the agent should use only what you ask it to work with. Grant it when you have a job that needs files, and turn it off when you do not.
Is the Mac app required?
No. The same Meta account works on the web and on the phone. The Mac app is the one that can see local files and local apps.
Can it fill in a form?
Meta’s download page says it can fill out forms, with your permission. Read the form before you let it submit. Submitting is an action, and Meta says unexpected actions are possible.
Where do I see the free limit?
Menu, then Settings, then Usage. On the web, Menu is at the bottom left. The upgrade steps are in Subscribe to Muse.
Sources
- Download Muse for Mac
- How Muse works with files and apps on your Mac, Meta Help
- How to get started with Muse, Meta Help
- Where Muse is available
This guide is independent. It is not written or endorsed by Meta.