Meta's personal AI agent has a new home on the desktop. A Mac app for Muse arrived on September 18, 2026, ten days after the product first went live in the United States across iOS, Android, and muse.ai on September 8, 2026.
The Mac build is offered as a direct macOS download from Meta's official Muse download page, packaged as a Muse-1.0 disk image. Free iPhone and Android apps sit alongside it on the same page.
Meta announced Muse on September 8, 2026, pitching it as a secure, private personal AI agent that takes action instead of only answering questions. The US rollout covered iOS, Android, and muse.ai. Muse also works directly inside WhatsApp, and Meta says it is coming soon to AI glasses.
Inside the Mac App
With the user's permission, the Mac app organizes files, fills out forms, and pulls from Messages, Calendar, and Notes. Meta's product page frames the desktop version as working across files, apps, and browser tabs.
Continuity between devices is a selling point on the download page. Meta describes beginning a task on a phone, checking in from a laptop, and nudging it along from WhatsApp, with the agent holding the thread across every device. On muse.ai, users are told they can chat with the agent through the Muse mobile or Mac app, or straight in WhatsApp, the same way they message other people.
Muse runs on Muse Spark, which Meta calls its most capable model to date and describes as built for real-world agentic work. Meta says the agent can send email and book travel. It can also take on longer-term goals by developing a personalized plan and advancing the work on its own, including opening a browser, filling out forms, and negotiating on a person's behalf.
When a task takes more time, Meta says the agent keeps working after the app is closed and returns when something changes or when it needs approval, such as before sending an email or making a purchase.
Price, Store Listing, and Data Disclosures
At launch, Meta said Muse is free for most of what people need, with subscription plans for those who want to do more. The product page FAQ puts it plainly: Muse is free with a usage limit, after which users can upgrade to a paid subscription or wait for the free limit to refresh.
The App Store listing shows the iPhone app from developer Meta Platforms, Inc. as free with in-app purchases. It requires iOS 18.0 or later, carries an 18+ age rating, and is a 116.3 MB download. Version history on the listing reaches back to early September 2026.
Privacy disclosures written by the developer on that listing say the app may collect and link to users data categories including health and fitness, financial information, location, contacts, and browsing history. Apple notes it has not verified those disclosures.
The Security Setup Meta Describes
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Meta says Muse runs on Muse Secure VM, a dedicated virtual machine that houses both the agent and a person's data, contained so no one else's agent can reach it. The muse.ai site describes Muse Secure VM as a persistent, isolated Linux virtual machine equipped with a full browser and enough storage, CPU, and memory to do the kinds of things a user would do on their own computer.
A separate Sentinel agent runs on the same machine, kept apart from Muse at the system level, according to Meta's launch announcement. Nothing Muse does reaches the internet unless Sentinel approves it, and Sentinel asks the person for permission when needed.
Meta says Muse has no visibility into people's passwords or payment methods. Credentials go into secure storage the agent can use without seeing, including passwords a person types into the browser themselves, with 1Password support planned.
At checkout, Muse uses Link built by Stripe, whose wallet for agents generates a one-time-use card so real card details stay hidden. Meta says Muse is the first AI agent covered by Link's purchase protections, which provide free coverage for damaged or lost items, price drops, no-fee returns, and a return guarantee on eligible purchases. Shop Pay is coming soon as another way to pay.
Access Controls, Training, and the Audit Trail
People choose which apps Muse connects to and exactly how much access it gets, per Meta, and they can change access or disconnect a service whenever they want. Users can opt out of having their interactions used to train Meta's AI models. Meta says Muse does not share a person's conversations or VM data with its ads systems. The agent shows people a complete audit trail of everything it has done and plans to do.
Meta's announcement also describes Muse Confidential VM, which will encrypt the entire virtual machine, including a person's data and conversations with Muse, with a key only the user holds, so that not even Meta can access it. Meta plans to introduce Muse Confidential VM later in 2026.
What Comes Next
The Mac release lands ten days after the initial US rollout. Muse stays free at the entry level, with paid tiers above it, and the company has signaled more platforms ahead. Meta says Muse is coming soon to AI glasses, and the muse.ai site points users to WhatsApp as a first-class way to reach the agent.
Aiden Cross, an AI-generated strategist at Unite.AI covering AI product strategy and execution, wrote about the launch. The publication covers the AI sector.
Meta's messaging around the Mac app leans on the same promises it made on September 8: permission-based access, an isolated virtual machine, and an agent that keeps working when the app is closed. The App Store version history for the iPhone app reaches back to early September 2026, matching the launch window.
For now, Mac users can download the Muse-1.0 disk image directly from Meta's download page, while iPhone and Android apps remain free to install. The App Store listing for the iPhone app carries an 18+ age rating and requires iOS 18.0 or later.
Meta has not said when Muse Confidential VM will ship beyond "later in 2026," nor when the agent will reach AI glasses.