Public release
Public
Source-linked recordSources linked
- Availability
- available
- Sources
- 2 linked
Release record
macOS 11.5
Source-linked record
Public release
- Recorded milestones
- 1
- Beta cycle
- —
- Average interval
- —
- Public release
- Jul 21, 2021
Chronology evidence
Version sources
These sources support version-level chronology or metadata. A researched version overview has not been added.
- About the security content of macOS Big Sur 11.5
Apple Support · 2026-08-17 · About the security content of macOS Big Sur 11.5
- Apple security releases
Apple Support · Apple · 2026-07-27T00:00:00.000Z · macOS 11.5; released July 21, 2021
Milestones
Release history
Every recorded channel appearance in chronological order. Open an appearance for any available build, scope, notes, and sources.
Historical context
Cycle comparison
Pace, intervals, and duration compared with earlier releases on the same platform.
Historical avg for .5 releases
41 days, 6.0 milestones
Based on 2 previous macOS .5 releases
Previous .5 releases (macOS)
| Version | Year | Cycle | Milestones | Avg. Interval |
|---|---|---|---|---|
| macOS 26.5 | 2026 | 42d | 6 | 8d |
| macOS 15.5 | 2025 | 40d | 6 | 8d |
Scroll horizontally to compare every historical field.