tvOS 11

Apple's security document dates tvOS 11 to September 19, 2017, for fourth-generation Apple TV. Apple TV 4K had been introduced on September 12 with availability announced for September 22. These are separate milestones: updating the older model does not turn it into 4K hardware.

Family

tvOS

Version

11

Platform

Apple TV (4th generation) / Apple TV 4K

Apple · tvOS 11 security content · Apple · Apple TV 4K · 2017-09-12

In MacRumors, Juli Clover described Home screen syncing between devices, automatic light and dark appearance and developer and management improvements. The 4K generation added 4K HDR playback with Dolby Vision and HDR10; that depended on hardware and content, not the tvOS number alone.

Juli Clover · MacRumors · tvOS 11 · 2017-09-19 · Apple · Apple TV 4K · 2017-09-12

In September, Apple still described AirPlay 2 as coming later. On May 29, 2018, it described multi-room audio with Apple TV in the AirPlay 2 ecosystem; that day Clover documented support in tvOS 11.4. This feature is not backdated to 11.0 because it appeared on an expectations list.

Apple · Apple TV 4K · 2017-09-12 · Juli Clover · MacRumors · tvOS 11.4 · 2018-05-29 · Apple · AirPlay 2 · 2018-05-29

Apple's archives record milestones from 11.0 through 11.4.1. The table separates release dates from later security-note edits and retains each source's hardware scope. These are documented historical versions, not a statement of current security support or a guarantee against vulnerabilities.

Apple · Security updates archive · 2016-2017 · Apple · Security updates archive · 2018-2019