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Release record

macOS 10.15.3

Source-linked record
Public release
Recorded milestones
1
Beta cycle
—
Average interval
—
Public release
Jan 28, 2020

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 Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra

    Apple Support · 2026-08-17 · About the security content of macOS Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra

  2. Apple security releases

    Apple Support · Apple · 2026-07-27T00:00:00.000Z · macOS 10.15.3; released January 28, 2020

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.