Apple ships tvOS 27.2 build 24K154 only for new Apple TV 4K
The build is limited to the fourth-generation Apple TV 4K; the earlier 24K122 release stays current for other models, according to 9to5Mac.
Apple released a new build of tvOS 27.2, build 24K154, exclusively for the fourth-generation Apple TV 4K, according to 9to5mac.com. The update was issued on November 2, 2026.
The previous tvOS 27.2 build, 24K122, remains the latest version available for existing Apple TV models. Apple has not published release notes explaining what changed in build 24K154.
According to a post on X by the user @itspdfu, build 24K154 enables Siri AI on the fourth-generation Apple TV 4K.
The new Apple TV 4K is available for preorder ahead of its November 13 launch, starting at $299. The device supports Siri AI, has built-in far-field microphones and offers a surround sound feature that pairs four compatible HomePods as front and rear speakers. It ships with a fourth-generation Siri Remote that supports Precision Finding and a sound-playback locator, and the remote is backward compatible with previous Apple TV 4K models and Apple TV HD.
Earlier tvOS 27.2 release
Last week, Apple released tvOS 27.2 alongside iOS 27.2, iPadOS 27.2, macOS 27.2, watchOS 27.2 and visionOS 27.2. That version added a Shuffle option for screen savers, more control over photos in screen savers, and support for American and British Sign Language in select movies and TV shows.
Quick answers
What is new in tvOS 27.2 build 24K154?
Apple has not published release notes. According to @itspdfu on X, the build enables Siri AI on the fourth-generation Apple TV 4K.
Which Apple TV models get build 24K154?
Only the fourth-generation Apple TV 4K. Build 24K122 remains the latest version for existing Apple TV models.
When does the new Apple TV 4K launch and how much does it cost?
It launches on November 13 and starts at $299. Preorders are open.