Meta's Muse lands on Mac, matches rival Instinct on calling — then faces privacy questions over message access

Meta's Muse agent is now on macOS, acting across files, messages, calendar, notes, and mail with opt-in approvals; both Muse and rival Instinct added phone calling this week as Instinct reportedly raises at a $10 billion valuation. A privacy incident — Muse…

Meta's consumer AI agent Muse is now available on macOS, where it can act on files, messages, calendar, notes, and mail inside their native applications on an opt-in basis, asking approval before sensitive actions such as deleting files or sending messages. MarkTechPost dates the launch September 17, 2026, announced by Mark Zuckerberg and Chief AI Officer Alexandr Wang; TechCrunch's coverage ran September 18, so sources disagree on the day. The free app is US-only, powered by Meta's Muse Spark model, with cloud execution in a Muse Secure VM where a separate Sentinel agent gates all outbound internet access; usage is free up to 100M tokens per week, Full Disk Access is optional, and Meta plans a user-key-encrypted Muse Confidential VM later in 2026 alongside a public bug bounty — Meta can currently access user data to operate the service. The desktop launch follows Muse's September 8 debut on iOS, Android, web, and WhatsApp, which topped the US App Store charts with over 730,000 US downloads in its first days. The consumer agent market is intensifying: Muse and rival Instinct both added voice calling — Instinct launched Instinct Concierge in early access for tasks like booking restaurants without online reservations and resolving cable bills (announced by founder Noah Shinn), while Muse expanded outbound calling to US businesses, prioritizing users who requested it. Instinct raised $350 million at a $2.5 billion valuation last month and is reportedly in talks to raise $1 billion at a $10 billion valuation; early consumer agent Poke was acquired by Cognition in July. Separately, The Verge reports privacy scrutiny: Inc contributing editor Jason Aten said Muse referenced message contents he never granted access to, and Muse claimed it saw 'notification previews' via device sync but could not explain how. Meta Superintelligence Labs' David Singleton said Muse does not watch notifications and syncs Messages data only after explicit opt-in, apologizing for the model's incorrect self-description.

• Muse for Mac launched September 17, 2026 per MarkTechPost; TechCrunch's coverage ran September 18 — sources disagree on the launch day
• Launch was announced by Mark Zuckerberg and Meta Chief AI Officer Alexandr Wang
• The macOS app acts on files, messages, calendar, notes, and mail in native apps; access is opt-in, destructive actions (deletes, sends) require explicit user approval, and Full Disk Access is optional
• It is free and US-only, powered by the Muse Spark model, with cloud execution in a Muse Secure VM where a separate Sentinel agent gates all outbound internet access
• Usage is free up to 100M tokens per week; a user-key-encrypted Muse Confidential VM is planned later in 2026, Meta runs a public bug bounty, and Meta can currently access user data to operate the service
• Muse debuted September 8, 2026 on iOS, Android, web, and WhatsApp, topping the US App Store charts with over 730,000 US downloads in its first days, outpacing the Meta AI app's launch
• Both Muse and Instinct added voice calling: Instinct launched Instinct Concierge in early access (restaurant bookings without online reservations, cable-bill disputes), announced by founder Noah Shinn; Muse expanded outbound calling to US…
• Instinct raised $350 million at a $2.5 billion valuation last month and is reportedly in talks to raise $1 billion at a $10 billion valuation