macOS 26.1

macOS 26.1 (build 25B78) is an update to macOS 26 (Tahoe) that was released to the public on November 3, 2025 by Apple Inc.^[1]

New features[]

Other than addressing system-related issues with background assets, game controllers, and SwiftUI, this update features the first implementation of the MCP protocol for AI agents.^[2] It also added an option for users to toggle the tinting and opacity of the Liquid Glass user interface.^[3]

Development history[]

The first developer beta (build 25B5042k) was released on September 22, 2025, followed by a second beta (build 25B5057f) on the following October 6th.^[4]^[5] The third beta (build 25B5062e) was released on October 13th, followed by a fourth (build 25B5072a) on October 20th.^[6]^[7]

A release candidate (build 25B77) was seeded on October 28, 2025.^[8]

References[]

↑ macOS 26.1 (25B78), Apple Developer. 2025-11-03.
↑ macOS Tahoe 26.1 public beta now available, here’s how to install it by Marcus Mendes, 9To5Mac. 2025-09-24.
↑ Apple Releases iOS 26.1 With Liquid Glass Toggle, Slide to Stop Alarm, New Apple Intelligence Languages and More by Juli Clover, MacRumors. 2025-11-03.
↑ macOS 26.1 beta (25B5042k), Apple Developer. 2025-09-22.^{[DEAD LINK]}
↑ macOS 26.1 beta 2 (25B5057f), Apple Developer. 2025-10-06.
↑ macOS 26.1 beta 3 (25B5062e), Apple Developer. 2025-10-13.^{[DEAD LINK]}
↑ macOS 26.1 beta 4 (25B5072a), Apple Developer. 2025-10-20.^{[DEAD LINK]}
↑ macOS 26.1 RC (25B77), Apple Developer. 2025-10-28.^{[DEAD LINK]}

External links[]

macOS Tahoe 26.1 Release Notes at Apple Developer
Apple security updates at Apple Support (2025-11-03)
- What's new in the updates for macOS Tahoe: macOS Tahoe 26.1 (2025-11-03)
- About the security content of macOS Tahoe 26.1 (2025-11-03)
macOS Tahoe: 26.1 at the BetaWiki

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Mac OS X / macOS versions
Mac OS X Server :	Server 1 (Rhapsody / Hera)
Mac OS X Developer Preview :	DP1 \| DP2 \| DP3 \| DP4
Mac OS X Public Beta :	Public Beta (Kodiak)
Mac OS X 10.0 (Cheetah) :	10.0.0 \| 10.0.1 \| 10.0.2 \| 10.0.3 \| 10.0.4
Mac OS X 10.1 (Puma) :	10.1.0 \| 10.1.1 \| 10.1.2 \| 10.1.3 \| 10.1.4 \| 10.1.5
Mac OS X 10.2 (Jaguar) :	10.2.0 \| 10.2.1 \| 10.2.2 \| 10.2.3 \| 10.2.4 \| 10.2.5 \| 10.2.6 \| 10.2.7 \| 10.2.8 (G3 / G4 · G5)
Mac OS X 10.3 (Panther) :	10.3.0 \| 10.3.1 \| 10.3.2 \| 10.3.3 \| 10.3.4 \| 10.3.5 \| 10.3.6 \| 10.3.7 \| 10.3.8 \| 10.3.9
Mac OS X 10.4 (Tiger) :	10.4.0 \| 10.4.1 \| 10.4.2 \| 10.4.3 \| 10.4.4 \| 10.4.5 \| 10.4.6 \| 10.4.7 \| 10.4.8 \| 10.4.9 \| 10.4.10 \| 10.4.11 \| 10.4.12 (PPC)
Mac OS X 10.5 (Leopard) :	10.5.0 \| 10.5.1 \| 10.5.2 \| 10.5.3 \| 10.5.4 \| 10.5.5 \| 10.5.6 \| 10.5.7 \| 10.5.8 \| 10.5.9 (PPC)
Mac OS X 10.6 (Snow Leopard) :	10.6.0 \| 10.6.1 \| 10.6.2 \| 10.6.3 \| 10.6.4 \| 10.6.5 \| 10.6.6 \| 10.6.7 \| 10.6.8
Mac OS X 10.7 (Lion) :	10.7.0 \| 10.7.1 \| 10.7.2 \| 10.7.3 \| 10.7.4 \| 10.7.5
OS X 10.8 (Mountain Lion) :	10.8.0 \| 10.8.1 \| 10.8.2 \| 10.8.3 \| 10.8.4 \| 10.8.5
OS X 10.9 (Mavericks) :	10.9.0 \| 10.9.1 \| 10.9.2 \| 10.9.3 \| 10.9.4 \| 10.9.5
OS X 10.10 (Yosemite) :	10.10.0 \| 10.10.1 \| 10.10.2 \| 10.10.3 \| 10.10.4 \| 10.10.5
OS X 10.11 (El Capitan) :	10.11.0 \| 10.11.1 \| 10.11.2 \| 10.11.3 \| 10.11.4 \| 10.11.5 \| 10.11.6
macOS 10.12 (Sierra) :	10.12.0 \| 10.12.1 \| 10.12.2 \| 10.12.3 \| 10.12.4 \| 10.12.5 \| 10.12.6
macOS 10.13 (High Sierra) :	10.13.0 \| 10.13.1 \| 10.13.2 \| 10.13.3 \| 10.13.4 \| 10.13.5 \| 10.13.6
macOS 10.14 (Mojave) :	10.14.0 \| 10.14.1 \| 10.14.2 \| 10.14.3 \| 10.14.4 \| 10.14.5 \| 10.14.6
macOS 10.15 (Catalina) :	10.15.0 \| 10.15.1 \| 10.15.2 \| 10.15.3 \| 10.15.4 \| 10.15.5 \| 10.15.6 \| 10.15.7
macOS 11 (Big Sur) :	11.0 · 11.0.1 \| 11.1 \| 11.2 · 11.2.1 · 2 · 3 \| 11.3 · 11.3.1 \| 11.4 \| 11.5 · 11.5.1 · 2 \| 11.6 · 11.6.1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 \| 11.7 · 11.7.1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10
macOS 12 (Monterey) :	12.0 · 12.0.1 \| 12.1 \| 12.2 · 12.2.1 \| 12.3 · 12.3.1 \| 12.4 \| 12.5 · 12.5.1 \| 12.6 · 12.6.1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 \| 12.7 · 12.7.1 · 2 · 3 · 4 · 5 · 6
macOS 13 (Ventura) :	13.0 · 13.0.1 \| 13.1 \| 13.2 · 13.2.1 \| 13.3 · 13.3.1 \| 13.4 · 13.4.1 \| 13.5 · 13.5.1 · 2 \| 13.6 · 13.6.1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 \| 13.7 · 13.7.1 · 2 · 3 · 4 · 5 · 6 · 7 · 8
macOS 14 (Sonoma) :	14.0 \| 14.1 · 14.1.1 · 2 \| 14.2 · 14.2.1 \| 14.3 · 14.3.1 \| 14.4 · 14.4.1 \| 14.5 \| 14.6 · 14.6.1 \| 14.7 · 14.7.1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 \| 14.8 · 14.8.1 · 2
macOS 15 (Sequoia) :	15.0 · 15.0.1 \| 15.1 · 15.1.1 \| 15.2 \| 15.3 · 15.3.1 · 2 \| 15.4 · 15.4.1 \| 15.5 \| 15.6 · 15.6.1 \| 15.7 · 15.7.1 · 2
macOS 26 (Tahoe) :	26.0 · 26.0.1 \| 26.1

[1] OS 26.1 (25B78), Apple Developer. 2025-11-03.

[2] OS Tahoe 26.1 public beta now available, here’s how to install it by Marcus Mendes, 9To5Mac. 2025-09-24.

[3] Apple Releases iOS 26.1 With Liquid Glass Toggle, Slide to Stop Alarm, New Apple Intelligence Languages and More by Juli Clover, MacRumors. 2025-11-03.

[4] OS 26.1 beta (25B5042k), Apple Developer. 2025-09-22.^{[DEAD LINK]}

[5] OS 26.1 beta 2 (25B5057f), Apple Developer. 2025-10-06.

[6] OS 26.1 beta 3 (25B5062e), Apple Developer. 2025-10-13.^{[DEAD LINK]}

[7] OS 26.1 beta 4 (25B5072a), Apple Developer. 2025-10-20.^{[DEAD LINK]}

[8] OS 26.1 RC (25B77), Apple Developer. 2025-10-28.^{[DEAD LINK]}

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