Meta brings Muse to Mac, letting its AI agent touch your files, mail and calendar
Days after topping the U.S. App Store on mobile, Meta's consumer AI assistant expands to desktop with opt-in permission to act inside native Mac apps. Rival Instinct is reportedly in talks to raise at a $10 billion valuation.
Meta expanded its Muse AI assistant to Mac on September 18, days after the app launched on mobile and web and rose to the top of the U.S. App Store charts, TechCrunch reported. On Mac, Muse can work with a user's files, messages, calendar, notes and mail inside their native applications. Access is opt-in, and the app requests approval before it takes a sensitive action. "The team is shipping fast," Mark Zuckerberg posted on X about the release.
A fast-moving, well-funded field
TechCrunch places the desktop expansion inside a broader consumer-agent buildout. Instinct, a rival personal-AI-assistant startup led by 23-year-old Noah Shinn, is reportedly in talks to raise $1 billion at a roughly $10 billion valuation, weeks after raising $250 million at a $2.25 billion valuation, as it hits compute capacity constraints from more than 100,000 users. Muse and Instinct both shipped voice calling the same week. The category is moving from chat interface to an agent that operates software directly.
Why "acts on your computer" is the detail to watch
An assistant that can touch mail, calendar and local files has a much bigger trust surface than one that answers questions. The opt-in, approve-before-sensitive-action design carries the weight here, so check it instead of taking it on faith. If you're watching consumer agents for what's coming to the workplace, the pattern matches enterprise tooling: the product race is in permissioned, agentic action. The auditing gap matters most there. You need to verify what the agent did, beyond what it says it did.