OS 26 supports the same devices as tvOS 18. However, some of the most important features won't be available to all Apple TVs.

Apple's tvOS 26 announced at WWDC requires second-generation Apple TV 4K devices and later, which means the company is excluding older

tvOS 26 can run on a decent range of Apple TVs: MacRumors reports that the developer beta, impressively, is compatible with all HD or 4K Apple TVs, going back to the model released in 2015. But the bad news is that the 2015 HD Apple TV, and the 1st-gen 4K model that came after it in 2017, don’t get the full range of tvOS 26 features and upgrades.