Juli Clover (no release notes, security, developer):

tvOS 27 features a redesigned Podcasts app, options for larger text and customizable subtitles, and a more responsive Control Center. AirPlaying to an Apple TV from another Apple device is faster, apps open quicker, and animations are smoother.

tvOS 27 works on the 2nd and 3rd generation Apple TV 4K models, and it drops support for the Apple TV HD and the first-generation Apple TV 4K.

Previously:

• tvOS 27 Announced
• tvOS 26

Update (2026-09-23): Steven Aquino:

Back in late May, I wrote about tvOS 27’s support for larger text sizes. […] After installing tvOS 27 on my A15 Apple TV, I immediately made a beeline to Settings > Accessibility > Text Size and spent a few minutes playing around with the larger text setting. As you’d expect, the UI for it is exactly what you’d see on iOS or iPadOS: a horizontal slider with notched intervals, with text overhead showing the adjusted size.

[…]

In the TV app, for example, using large text has material effects on, say, show descriptions and metadata. This is helpful because I’ve always struggled to read this information without physically walking up to the TV screen itself. On the other hand, I’m guessing third-party developers need to support the new API; in my testing, apps like Netflix and Pluto TV don’t (yet?) support larger text.

Accessibility tvOS tvOS 27 tvOS Release