Apple Releases macOS Tahoe 26.6.1 With Important Security Fix

Apple has released macOS Tahoe 26.6.1 with build number 25G76, bringing an important security fix for Mac users. The update arrived without developer or public beta testing and fixes a Screen Sharing vulnerability that could allow an attacker on the same network to authenticate without valid credentials.

The update comes just days after macOS Tahoe 26.6 and is available alongside macOS Sequoia 15.7.9 and macOS Sonoma 14.8.9. Apple recommends the latest updates for all users.

You can install macOS Tahoe 26.6.1 directly through System Settings:

1. Open the Apple menu in the top-left corner of your Mac.
2. Select System Settings.
3. Click General.
4. Select Software Update.
5. Wait while your Mac checks for available updates.
6. Click Update Now next to macOS Tahoe 26.6.1.
7. Follow the instructions and restart your Mac when required.

It is a good idea to save any open work before starting the installation since your Mac will need to restart.

All changes in macOS Tahoe 26.6.1

macOS Tahoe 26.6.1 focuses on security rather than introducing new features or visible interface changes.

• Screen Sharing security fix: The update fixes an authentication issue that could allow an attacker on the network to authenticate to Screen Sharing without valid credentials.
• Improved authentication handling: The Screen Sharing flaw was addressed through improved state management.
• CVE-2026-65400: The vulnerability is tracked under CVE-2026-65400.
• Build number: macOS Tahoe 26.6.1 carries build number 25G76.
• No new features announced: The release notes only mention important security fixes, so users should not expect new features or major visual changes.

There is currently no indication that the Screen Sharing vulnerability was actively exploited in the wild, but installing the update will protect Macs from the authentication flaw.

If you’ve already installed macOS Tahoe 26.6.1, let us know your experience in the comments.