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Release appearance

macOS 26.0 Beta 4

Full article
Developer beta

Recorded context

About this appearance

A clean archived Apple DocC boundary isolates macOS Tahoe 26 Beta 4; the raw diff has 26 added or status-changed lines and 9 removed or superseded lines, grouped here into 8 sourced occurrences.

Date
Jul 22, 2025
Availability
available
Revision
No

Release notes

What changed

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

Sequential archive diff

The CDX-confirmed before and after payloads bracket Beta 4 without crossing another macOS 26 milestone. The after-state page explicitly identifies itself as macOS Tahoe 26 Beta 4 Release Notes.[1][2]

Documented Beta 4 delta

The raw comparison contains 26 added or status-changed lines and 9 removed or superseded lines. This article groups the high-signal issue-ID transitions into 8 copyright-safe editorial occurrences rather than reproducing Apple's changelog.[1][2]

Attribution boundary

Each structured occurrence is limited to an issue ID or status change present in this clean adjacent boundary. A removed note without an explicit replacement is not treated as proof of a fix, and no later Public note or build identity is inherited.[1][2]

Source ledger

References

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

  1. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · After-state raw payload 20250727152747; macOS Tahoe 26 Beta 4 Release Notes

    Back to text ↑
  2. Archived macOS Tahoe 26 Beta 3 Release Notes — 20250713024323 raw state

    Apple Developer · 2026-07-30 · Before-state raw payload 20250713024323; macOS Tahoe 26 Beta 3 Release Notes

    Back to text ↑
  3. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · AirPlay — Known Issues; issue 155925891

  4. Archived macOS Tahoe 26 Beta 3 Release Notes — 20250713024323 raw state

    Apple Developer · 2026-07-30 · Before-state raw payload 20250713024323; comparison baseline

  5. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · Foundation Models framework — New Features; issues 152381043, 153770707, and 155801948

  6. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · Foundation Models framework — Resolved Issues; issues 153147722, FB17962270, 153151710, FB17963656, 153426645, FB18074984, 154904647, and 155273863

  7. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · Resolved Issues diff; issues 152197565, 152465491, 151658533, 152336867, and 154889929

  8. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · StoreKit — Resolved Issues; issues 150851879 and 155449267

  9. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · Swift Charts — Resolved Issues; issue 109164195

  10. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · WebKit API — New Features and Resolved Issues; issues 152414525, 152904248, FB17850359, and 146576790

  11. Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state

    Apple Developer · 2026-07-30 · Xcode Previews — Known Issues; issue 141641869

Release changes

Changed in this release

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

bugFix · fixed

Foundation Models schema, language, tool, and guardrail fixes

documentedconfirmed

The clean diff groups five issue-ID transitions into resolved framework behavior.

  1. [1] Archived macOS Tahoe 26 Beta 3 Release Notes — 20250713024323 raw state · Before-state raw payload 20250713024323; comparison baseline
  2. [2] Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state · Foundation Models framework — Resolved Issues; issues 153147722, FB17962270, 153151710, FB17963656, 153426645, FB18074984, 154904647, and 155273863

developerApi · changed

WebPage navigation and loading API changes

documentedconfirmed

Beta 4 groups two new WebPage loading behaviors with a corrected scroll-content-size report.

  1. [1] Archived macOS Tahoe 26 Beta 3 Release Notes — 20250713024323 raw state · Before-state raw payload 20250713024323; comparison baseline
  2. [2] Archived macOS Tahoe 26 Beta 4 Release Notes — 20250727152747 raw state · WebKit API — New Features and Resolved Issues; issues 152414525, 152904248, FB17850359, and 146576790