Apple barely mentioned tvOS 27 in its WWDC keynote today, but the update does exist , and is available now in beta. But two previously supported Apple TV models are not compatible with tvOS 27. tvOS 27 not supported on Apple TV HD or first-gen Apple TV 4K If you were watching today’s WWDC keynote, you might be surprised to hear that Apple has a new tvOS 27 update coming. That’s partly because of the unique format of the event, which didn’t follow a typical “one OS at a time” approach. But it’s also because Apple had very little to say about tvOS. The few new features we do know about were mentioned on a slide along with many other features across other platforms. And now, thanks to Aaron Perris and his post on X , we know about tvOS 27’s compatibility. tvOS 27 drops support for: Apple TV HD Apple TV 4K (1st gen) — Aaron (@aaronp613) June 8, 2026 Per Perris, Apple TV HD and the first-gen Apple TV 4K are not supported by tvOS 27.…