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Release record

tvOS 12.1

Full article
Public release
Recorded milestones
6
Beta cycle
42d
Average interval
8d
Public release
Oct 30, 2018

Release notes

Overview

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

Release overview

tvOS 12.1 was released on October 30, 2018 with general performance and stability improvements plus security repairs in cryptography, string processing, IPsec, the kernel, mail, VPN handling, WebKit, and Wi-Fi.[1][2]

Evidence boundary

Apple's consumer history names no individual ordinary change for 12.1. The archive keeps maintenance generic and uses the advisory only for its enumerated security work.[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 12.1

    Apple Support · Apple · 2018-10-30T00:00:00.000Z · Released October 30, 2018

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

    Apple Support · Apple · 2026-07-29 · tvOS 12.1

    Back to text ↑
  3. About the security content of tvOS 12.1

    Apple Support · Apple · 2018-10-30T00:00:00.000Z · tvOS 12.1 security content

    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 12.1 security repairs

documentedconfirmed

Apple's advisory documents memory-safety, privilege, information-disclosure, denial-of-service, DNS-leak, web-processing, and wireless fixes.

Recorded at Public

  1. [1] About the security content of tvOS 12.1 · CoreCrypto; ICU; IPSec; Kernel; Mail; NetworkExtension; WebKit; WiFi

Milestones

Release history

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

  2. +14 days
  3. +7 days
  4. +6 days
  5. +7 days
  6. +8 days

    Public release

    Public

    Full articleEditorially verified

    tvOS 12.1 reached the public channel on October 30, 2018 with general performance and stability improvements and version-specific security repairs.

    Availability
    available
    Sources
    3 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

43 days, 5.3 milestones

Based on 10 previous tvOS .1 releases

Cycle vs. platform average

42d (avg: 58d)

16 days shorter than the tvOS average

Duration ranking

#32 of 50

Middle of the pack tvOS beta cycles

Longest gap in this cycle

14 days

Between Beta 1 and Beta 2

Previous .1 releases (tvOS)

Previous comparable tvOS releases
VersionYearCycleMilestonesAvg. Interval
tvOS 18.1202441d68d
tvOS 16.1202240d77d
tvOS 15.1202134d67d
tvOS 13.3.1202042d414d
tvOS 12.1.1201835d59d
tvOS 11.1201734d59d

Scroll horizontally to compare every historical field.

Official release notes