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Release record

tvOS 15.1

Full article
Public release
Recorded milestones
6
Beta cycle
34d
Average interval
7d
Public release
Oct 25, 2021

Release notes

Overview

Editorial synthesis with inline references and a source ledger when citations are available.

Release overview

tvOS 15.1 was released on October 25, 2021. Its named feature was SharePlay, which synchronized Apple TV viewing while participants continued a FaceTime conversation from an iPhone or iPad.[1][2]

Evidence boundary

Apple also describes general performance and stability work and documents fixes across media and document processing, privacy boundaries, iCloud, the kernel, secure text entry, and WebKit. No undocumented-change list is inferred.[3][2]

Source ledger

References

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

  1. About the security content of tvOS 15.1

    Apple Support · Apple · 2021-10-25T00:00:00.000Z · Released October 25, 2021

    Back to text ↑
  2. About Apple TV 4K and Apple TV HD software updates

    Apple Support · Apple · 2026-07-29 · tvOS 15.1

    Back to text ↑
  3. About the security content of tvOS 15.1

    Apple Support · Apple · 2021-10-25T00:00:00.000Z · Audio; CoreGraphics; FileProvider; iCloud; Kernel; UIKit; WebKit

    Back to text ↑

Documented & observed

Changes in this version

Source-linked features, fixes, known issues, removals, and community-observed behavior recorded across this version’s appearances and verified builds.

Release changes

Changed in this release

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

security · fixed

tvOS 15.1 security repairs

documentedconfirmed

Apple's advisory records fixes across Audio, ColorSync, CoreAudio, CoreGraphics, FileProvider, Game Center, iCloud, the kernel, UIKit, and WebKit.

Recorded at Public

  1. [1] About the security content of tvOS 15.1 · Audio; ColorSync; CoreAudio; CoreGraphics; FileProvider; Game Center; iCloud; Kernel; UIKit; WebKit

Milestones

Release history

Every recorded channel appearance in chronological order. Open an appearance for any available build, scope, notes, and sources.

  2. +7 days
  3. +8 days
  4. +7 days
  5. +5 days
  6. +7 days

    Public release

    Public

    Full articleEditorially verified

    tvOS 15.1 reached the public channel on October 25, 2021 with SharePlay, general performance and stability work, and a version-specific security repair set.

    Availability
    available
    Sources
    5 linked
    Open this appearance

Historical context

Cycle comparison

Pace, intervals, and duration compared with earlier releases on the same platform.

Historical avg for .1 releases

44 days, 5.3 milestones

Based on 10 previous tvOS .1 releases

Cycle vs. platform average

34d (avg: 59d)

25 days shorter than the tvOS average

Duration ranking

#47 of 50

Middle of the pack tvOS beta cycles

Longest gap in this cycle

8 days

Between Beta 2 and Beta 3

Previous .1 releases (tvOS)

Previous comparable tvOS releases
VersionYearCycleMilestonesAvg. Interval
tvOS 18.1202441d68d
tvOS 16.1202240d77d
tvOS 13.3.1202042d414d
tvOS 12.1.1201835d59d
tvOS 12.1201842d68d
tvOS 11.1201734d59d

Scroll horizontally to compare every historical field.

Official release notes