Apple macOS Tahoe (26) Update Version macOS Tahoe 26.6
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Update Summary
macOS Tahoe 26.6 adds SDK support for Xcode 26.6 and includes fixes for deprecation notifications, HealthKit statistics, and HDR screenshots in Messages. Encrypted HFS+ (CoreStorage) is deprecated and will not be supported in macOS 28.
Update Details
Bug Fixes
- Fixed deprecation notifications that could incorrectly identify a host app as Intel-only when a system plugin loader loads x86 code into the host process.
- Fixed HealthKit temporally-weighted average queries for discrete quantity types, which could return erroneously high values when samples overlap in time.
- Fixed HDR screenshots that might appear garbled when sent in Messages.
New Features
- macOS 26.6 SDK support for developing apps for Mac computers running macOS Tahoe 26.6.
Hints
- Encrypted HFS+ (CoreStorage) is deprecated and will not be supported in macOS 28; use encrypted APFS-formatted external drives for backups instead.
- The SDK is bundled with Xcode 26.6, available from the Mac App Store.
Product Information
Vendor: Apple
Product: macOS
Product type: Software
Platform: macOS
Variant: Tahoe (26)
Version: macOS Tahoe 26.6
Vendor information published: Jul 27, 2026
Original release notes: View on vendor site
Published on updatealert.io: Sep 17, 2026
Description: Desktop operating system for Apple Mac devices.