Apple released tvOS 12 Developer Beta 10 on Friday, with iOS 12 developer Beta 12 and watchOS 5 developer beta 10. This beta version is available for the 4th generation Apple TV and Apple TV 4K.
tvOS 12 provides support for Dolby Atmos' Apple TV, eliminating support from cable service providers, without having to enter account authentication information for each application, new screensaver for the International Space Station, etc.
tvOS 12 supports 4th generation Apple TV and Apple TV 4K. This fall, tvOS 12 will be released together with iOS 12, watchOS 5, macOS Mojave.
[Apple Releases iOS 12 Developer Beta 11 for iPhone and iPad]
[[[[Apple, release of beta 9 for macOS Mojave developers]
Developers can register Apple TV in the beta program on the Apple developer website. A matching public beta is most likely to come later today.