Meta launches Muse for Mac, expanding its personal AI agent to macOS and enabling it to operate as a proactive assistant across native apps, including Files, Messages, Calendar, Notes, and Mail, with user-permission required for actions.

Muse for Mac follows its iOS, Android, and web debut, bringing desktop integration to the Muse ecosystem and allowing interaction with local applications and data.

The rollout emphasizes privacy and control, featuring opt-in permissions, granular access controls, optional Full Disk Access, and prompts for sensitive actions like deleting files or sending messages.

There is a regional access issue for Canadians, as the official waitlist portal currently restricts to US addresses, with VPNs mentioned as a workaround.

Muse operates on a secure VM with a Sentinel companion for permissioned Internet access, with assurances it won’t access passwords or payment methods and plans to add 1Password support; Stripe Link is used for one-time payments.

Muse can connect to user-authorized apps and provide an audit trail; users can opt out of training usage and manage privacy and data-sharing settings.

A tiered model applies, with a free plan and higher usage options for subscribers; the iPhone app remains free with in-app purchases and requires iOS 18.0 or later.

The Mac release occurs amid rapid AI agent feature races as companies push for market share and user adoption in a broader disruption of apps, SaaS, and ecosystems.

Muse can batch-process tasks in the background, such as sorting folders, summarizing notes and chats, and auto-filling forms using local documents, with the ability to resume activity after closing the window.

Zuckerberg frames safety alignment as a competitive feature, with desktop integration moving beyond browser limits toward actionable local-OS capabilities.

The Mac app integrates with Messages, Calendar, and Notes, helps organize files, and maintains continuity across devices, including task progression in WhatsApp.

Muse is described as a secure, private agent capable of tasks like email and travel booking, developing long-term plans, and continuing work after the app closes, always requiring user permission.