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Release record

tvOS 11.3

Full article
Public release
Recorded milestones
7
Beta cycle
64d
Average interval
11d
Public release
Mar 29, 2018

Release notes

Overview

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

Release overview

tvOS 11.3 was released on March 29, 2018 with Apple TV app expansion, Brazilian Portuguese Siri, original-frame-rate playback on Apple TV HD, and security repairs.[1][2]

Evidence boundary

Apple's consumer notes list three named additions and retain geographic and device qualifications. The page does not import capabilities from 11.4 or infer broader availability.[3][4]

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 11.3

    Apple Support · Apple · 2018-03-29T00:00:00.000Z · Released March 29, 2018

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

    Apple Support · Apple · 2026-07-29 · tvOS 11.3

    Back to text ↑
  3. About the security content of tvOS 11.3

    Apple Support · Apple · 2018-03-29T00:00:00.000Z · tvOS 11.3 security content

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

    Apple Support · Apple · 2026-07-29 · tvOS 11.3; regional Siri footnote

    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 11.3 security repairs

documentedconfirmed

Apple's advisory records race-condition, memory-safety, disclosure, spoofing, profile-cleanup, cross-origin, and code-execution fixes.

Recorded at Public

  1. [1] About the security content of tvOS 11.3 · CoreFoundation; CoreText; File System Events; Kernel; libxml2; NSURLSession; Quick Look; Security; System Preferences; WebKit

Milestones

Release history

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

  2. +13 days
  3. +20 days
  4. +7 days
  5. +7 days
  6. +4 days
  7. +13 days

    Public release

    Public

    Full articleEditorially verified

    tvOS 11.3 reached the public channel on March 29, 2018 with regional app and Siri expansion, frame-rate matching on Apple TV HD, and a broad security repair set.

    Availability
    available
    Sources
    7 linked
    Open this appearance

Historical context

Cycle comparison

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

Historical avg for .3 releases

39 days, 5.0 milestones

Based on 4 previous tvOS .3 releases

Cycle vs. platform average

64d (avg: 58d)

6 days longer than the tvOS average

Duration ranking

#14 of 50

Middle of the pack tvOS beta cycles

Longest gap in this cycle

20 days

Between Beta 2 and Beta 3

Previous .3 releases (tvOS)

Previous comparable tvOS releases
VersionYearCycleMilestonesAvg. Interval
tvOS 15.3202240d413d
tvOS 14.3202032d66d
tvOS 13.3201935d59d
tvOS 12.3201947d512d

Scroll horizontally to compare every historical field.

Official release notes