Meta has moved its Muse AI agent onto macOS, and the pitch is convenience: it can now reach directly into your files and applications to get things done for you. The unspoken half of that pitch is that Meta, a company whose entire fortune is built on knowing everything about you, now has an agent sitting on your laptop with its hands in your documents. Helpful. Also, if you have met Meta before, a little bit like handing your house keys to the world’s nosiest neighbour.
What it actually does
An agent with real access to your local files and apps is genuinely more useful than a chatbot in a browser tab. It can pull details out of a document, move information between programs, and act on the stuff already on your machine instead of making you copy-paste your life into a chat window. This is the direction every assistant is heading, from Anthropic’s desktop tools to Google’s, because the value of an AI jumps the moment it can touch your actual work rather than just talk about it.
The catch is the same one that follows Meta everywhere: what leaves the machine, and what gets logged. An assistant that reads your files is only as trustworthy as the company running it, and Meta’s reputation on the question of “where does my data go” is, to put it gently, not spotless. Local file access plus a business model historically powered by harvesting personal data is a combination worth reading the settings over, twice.
The takeaway
If you want a capable desktop agent, Muse on your Mac is a real one, and worth trying on the boring tasks it is good at: fishing facts out of documents, shuffling data between apps, drafting from what you already have. Just go in with your eyes open about whose agent it is. The useful question for any of these file-reading assistants is not “can it help,” it is “what does it keep,” and with Meta specifically, that is a question worth asking before you point it at anything you would not want summarised on a server somewhere. (Sources: Meta, September 2026.)
Related: the desktop AI agents worth paying for.