Apple has been running its public beta program for some time with both macOS and iOS and now Apple is also adding their tvOS to the program.
Apple recently released betas for macOS High Sierra and iOS 11 and now they are also going to relese a public beta for their tvOS.
The iOS 11, macOS High Sierra, and tvOS 11 public betas are coming soon. As a member of the Apple Beta Software Program, you can help shape Apple software by test-driving pre-release versions and letting us know what you think. If you’re not already a member, sign up today.
The public beta program has been successful for Apple so it make sense for them to expand it to their tvOS as well as iOS and macOS.
Source iMore