Juli Clover (release notes, security, enterprise, developer, full installer, IPSW):

According to Apple’s release notes for the update, macOS Tahoe 26.6 includes security fixes for the Mac and it optimizes Spotlight for the release of macOS 27.

Mr. Macintosh:

Additionally a fix addressed where some notifications incorrectly displayed deprecation notices for some apps identified as Intel processor only. Also addressed was that HDR screenshots might appear garbled when sent in Messages.

Mr. Macintosh:

The macOS Tahoe 26.6 update breaks the all‑time record for CVEs patched in a single macOS release, with a total of 155.

Here’s a look back at how many CVEs were patched in each Tahoe update so far.

See also: Hacker News.

Howard Oakley:

Patrick Wardle has also drawn attention to a change in the leaf certificate used to sign Apple binaries to “macOS Software Signing”, where previously it was just “Software Signing”.

Previously:

• Golden Gate Spotlight
• macOS 26.5.1

Marcus Mendes:

Following the rollout of no less than seven Release Candidates, Apple has now finally released macOS Sonoma 14.8.8 and macOS Sequoia 15.7.8 officially.

macOS 15.7.8 (security, full installer):

This update provides important security fixes and is recommended for all users.

macOS 14.8.8 (security, full installer):

This update provides important security fixes and is recommended for all users.

Previously:

• macOS 15.7.7 and macOS 14.8.7