http://wccftech.com/download-tvos-11-gm/ >Apart from the announcement of the Apple TV 4K, the Cupertino giant has released tvOS 11 GM for developers and public beta testers. >On the software end, tvOS 11 turned out to be a subtle update. But for the new 4K-enabled Apple TV, it is a giant leap forward since it carries the necessary resources to drive 4K images on a TV. The software update is also available for current Apple TV 4 users as well. Therefore it’s highly recommended that you go ahead with the update process right away and see for yourself what Apple has been working on since the past few months.