Release appearance
macOS 27.0 Beta 4
Recorded context
About this appearance
This Beta 4 page records the current macOS Golden Gate 27 seed while treating announced features and transition guidance as cumulative version scope.
- Date
- Jul 20, 2026
- Availability
- available
- Revision
- No
- Build
26A5388G
Chronology evidence
Appearance sources
These sources support the recorded date, channel, or availability. A researched release-notes article has not been added.
- macOS 27 Preview
Apple · 2026-07-29 · Apple Intelligence
- macOS 27 Golden Gate Release Notes (living beta document)
Apple Developer Documentation · Apple · 2026-07-29 · Compatibility and deprecations
- macOS 27 Golden Gate Release Notes (living beta document)
Apple Developer Documentation · Apple · 2026-07-29 · DiskImageKit
- macOS Golden Gate 27 Beta 4 (26A5388g)
Apple Developer · 2026-07-29 · macOS Golden Gate 27 Beta 4; build 26A5388g
- macOS 27 Preview
Apple · 2026-07-29 · Performance and displays
- macOS 27 Preview
Apple · 2026-07-29 · Photos
- Apple unveils next generation of Apple Intelligence, Siri AI, and more
Apple Newsroom · Apple · 2026-06-08T00:00:00.000Z · Siri AI and availability
- macOS 27 Preview
Apple · 2026-07-29 · Version-level preview
- macOS 27 Preview
Apple · 2026-07-29 · Visual Intelligence
- macOS Golden Gate 27 Beta 4 (26A5388g)
Apple Developer · 2026-07-29
Legacy chronology source: Apple Developer
Release changes
Cumulative context
Broader context included for understanding, not claimed as new in this release.
feature · introduced
Onscreen Visual Intelligence
Apple announced onscreen Visual Intelligence for supported Macs as a version-level capability, not a Beta 4 delta.
- [1] macOS 27 Preview · Visual Intelligence
feature · introduced
Next-generation Siri intelligence
This is a version-level announced capability, not a Beta 4 delta; Apple says the next Siri experience is due later in 2026 and subject to availability requirements.
- [1] macOS 27 Preview · Apple Intelligence
- [2] Apple unveils next generation of Apple Intelligence, Siri AI, and more · Siri AI and availability
developerApi · introduced
DiskImageKit Swift sparse and raw image APIs
Developers gained documented Swift APIs for creating or working with sparse and raw disk images during the macOS 27 beta cycle.
enhancement · changed
AirDrop, network, Safari, and ultrawide improvements
Apple’s cumulative version plan includes AirDrop, network, Safari, and ultrawide-mode improvements, not a Beta 4-only delta.
- [1] macOS 27 Preview · Performance and displays
enhancement · changed
Expanded Photos intelligence tools
Apple’s version-level Photos plan adds new creative and cleanup workflows; it is not identified as first appearing in Beta 4.
- [1] macOS 27 Preview · Photos
compatibility · changed
Intel software transition warnings
The beta series adds guidance for software that depends on Intel translation, preparing users and developers for macOS 28 changes.
- [1] macOS 27 Golden Gate Release Notes (living beta document) · Compatibility and deprecations