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Release record

macOS 11.2.1

Source-linked record
Public release
Recorded milestones
1
Beta cycle
—
Average interval
—
Public release
Feb 9, 2021

Chronology evidence

Version sources

These sources support version-level chronology or metadata. A researched version overview has not been added.

  1. About the security content of macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, and macOS Mojave 10.14.6 Security Update 2021-002

    Apple Support · 2026-08-17 · About the security content of macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, and macOS Mojave 10.14.6 Security Update 2021-002

  2. Apple security releases

    Apple Support · Apple · 2026-07-27T00:00:00.000Z · macOS 11.2.1; released February 9, 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.