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Release appearance

tvOS 11.3 Public

Full article
Public release

Recorded context

About this appearance

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.

Date
Mar 29, 2018
Availability
available
Revision
No

Release notes

What changed

Original editorial synthesis. Linked references appear with the claims they support and in the source ledger.

Public release

Apple released tvOS 11.3 on March 29, 2018. Its consumer history identifies three user-facing changes spanning content discovery, language support, and video playback.[1][2]

Documented scope

The update's feature claims remain limited to Brazil, Mexico, Brazilian Portuguese, and Apple TV HD where Apple specifies them. The advisory supplies the separate security record.[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 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 the security content of tvOS 11.3

    Apple Support · Apple · 2018-03-29T00:00:00.000Z · CoreFoundation; CoreText; File System Events; Kernel; libxml2; NSURLSession; Quick Look; Security; System Preferences; WebKit

  5. About Apple TV 4K and Apple TV HD software updates

    Apple Support · Apple · 2026-07-29 · tvOS 11.3 — Apple TV App

  6. About Apple TV 4K and Apple TV HD software updates

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

  7. About Apple TV 4K and Apple TV HD software updates

    Apple Support · Apple · 2026-07-29 · tvOS 11.3 — Video playback

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.

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

enhancement · changed

Original frame-rate playback on Apple TV HD

documentedconfirmed

tvOS 11.3 extended frame-rate matching behavior to Apple's HD model for supported content and displays.

  1. [1] About Apple TV 4K and Apple TV HD software updates · tvOS 11.3 — Video playback