Apple has just released the update to bring macOS Tahoe to version 26.5.2. Although there are currently no concurrent macOS security updates for Sonoma or Sequoia, Apple has released Safari 26.5.2 for them. That apparently includes patches to address a huge total of 32 vulnerabilities.

Its download size on an Apple silicon Mac is about 2.7 GB.

Security release notes are already available here. This addresses a total of about 29 vulnerabilities, including three in the kernel and a whole slew in WebKit. None are believed to have been exploited in the wild yet.

The build number of macOS 26.5.2 is 25F84, with a Darwin Kernel Version of 25.5.0 from Tue Jun 9 22:28:34 PDT 2026, and XNU 12377.121.10~1.

There is a firmware update for Apple silicon Macs to mBoot 18000.121.3.

The following bundled apps have been updated:

• Messages, a small build increment
• Passwords, to version 2.5.2
• Photos, a small build increment
• Safari, to version 26.5.2 (21624.2.5.11.8).

Changes in /System/Library include:

• kernel extensions updated include AppleAVD and IOGPUFamily
• APFS to version 2811.121.1
• Frameworks updated include CoreFoundation, CoreMedia, CoreText, Foundation, ImageIO, MediaExtension, MediaToolbox, Photos, PhotosUI, VideoToolbox
• many Private Frameworks have minor build increments, including most Photos*
• CoreMedia.mdimporter has a build increment.

Updated with Safari info 2115 GMT 29 June 2026. Thanks to Mr. Macintosh for the info on Safari updates for macOS 14 and 15,