https://wccftech.com/download-tvos-12/

Apple TV owners can now breathe a sigh of relief as the final version of tvOS 12 is now available for download. We’ll show you how you can update right now.

If you’re a set-top box enthusiast and happen to own an Apple TV, then you already know how important the underlying software can be at times. Things are even more wonderful on the Apple TV 4K side of the fence as that is the place where tvOS 12 shines the most, Apple’s new software update for its TV platform. Why is that so, you ask? Because while the Apple TV 4K did ship with 4K HDR support out of the box, tvOS 12 takes those features a bit further with the addition of Dolby Atmos support. This feature only works if you have compatible hardware set right up with your Apple TV.