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Release appearance

macOS 26.6 RC

Full article
Release candidate

Recorded context

About this appearance

Apple's macOS 26.6 RC-specific developer note documents the encrypted-HFS+ deprecation and fixes for compatibility notices, HealthKit statistics, and HDR screenshots in Messages, without assigning public-only, build-specific, or earlier-beta material to this route.

Date
Jul 20, 2026
Availability
available
Revision
No

Release notes

What changed

Original editorial synthesis. Linked references appear with the claims they support and in the source ledger.

Release candidate documentation

Apple's canonical developer page identifies itself as macOS Tahoe 26.6 RC Release Notes. This article attaches only the changes enumerated on that RC-labeled page to the existing RC route.[1]

Documented RC delta

The canonical developer note still identifies itself as macOS Tahoe 26.6 RC Release Notes and limits the structured inventory here to the encrypted-HFS+ deprecation and fixes for compatibility notices, HealthKit statistics, and HDR screenshots in Messages. Each occurrence below comes from an item Apple places on that RC page.[1]

Evidence boundary

No cumulative public support note, public security advisory, earlier beta snapshot, undocumented behavior, build number, release date, or cross-platform assumption is projected onto this event. The current RC-titled developer note supports the enumerated changes, but it does not provide durable historical artifact metadata.[1]

Source ledger

References

Sources are linked to the claims they support. Publication and access dates are shown when available.

  1. macOS Tahoe 26.6 Release Notes

    Apple Developer · 2026-07-29 · macOS Tahoe 26.6 RC Release Notes; RC overview and enumerated sections

    Back to text ↑
  2. macOS Tahoe 26.6 Release Notes

    Apple Developer · 2026-07-29 · CoreStorage — Deprecations

  3. macOS Tahoe 26.6 Release Notes

    Apple Developer · 2026-07-29 · Ecosystem — Resolved Issues

  4. macOS Tahoe 26.6 Release Notes

    Apple Developer · 2026-07-29 · HealthKit — Resolved Issues

  5. macOS Tahoe 26.6 Release Notes

    Apple Developer · 2026-07-29 · Messages — Resolved Issues

  6. Apple Developer

    Apple Developer · 2026-07-29

    Legacy chronology source: Apple Developer

Release changes

Changed in this release

Features, fixes, removals, and regressions first observed in this release record.

bugFix · fixed

False Intel-only compatibility notice fix

documentedconfirmed

The RC corrected compatibility notices that blamed a host application when a system plug-in loader was the component loading x86 code.

  1. [1] macOS Tahoe 26.6 Release Notes · Ecosystem — Resolved Issues

bugFix · fixed

HDR screenshot delivery in Messages

documentedconfirmed

The RC notes identify a fix for HDR screenshots becoming garbled when sent through Messages.

  1. [1] macOS Tahoe 26.6 Release Notes · Messages — Resolved Issues

removal · changed

Encrypted HFS+ CoreStorage deprecation

documentedconfirmed

The RC notes deprecate encrypted HFS+ through CoreStorage, identify macOS 28 as the planned support boundary, and direct external backups toward encrypted APFS.

  1. [1] macOS Tahoe 26.6 Release Notes · CoreStorage — Deprecations

bugFix · fixed

Overlapping-sample HealthKit average fix

documentedconfirmed

The RC corrected erroneously high temporally weighted averages for discrete quantities when samples overlap in time.

  1. [1] macOS Tahoe 26.6 Release Notes · HealthKit — Resolved Issues