In addition to releasing iOS 9.2 for iPhone, iPad, and the iPod Touch devices, Apple has also released tvOS 9.1 software update for the new Apple TV 4. This is the first major update released after a minor software update: tvOS 9.0.1, which was pushed in November.
tvOS 9.1 comes with a build number 13U85 and brings numerous tweaks, bug fixes and under the hood improvements to the Apple TV software. Apple had rebranded its Apple TV software as tvOS and launched it back in October.
With tvOS 9.1, Apple’s own Remote app now works with the new Apple TV 4 and you can use Siri to search through Apple Music and ask Siri to play a song of your choice using voice controls.
How to download and install tvOS 9.1 on Apple TV 4
Depending on the settings you have set, your Apple TV 4 should either automatically display a prompt to install the downloaded tvOS 9.1 OTA update, or it could automatically update to latest software version without user intervention.
If you have chosen to manually install any tvOS update, then you can install it by going into Settings > System > Software Updates > Update Software on your Apple TV. The update prompt should now appear. It is normal if you are not seeing the update prompt yet because changes take some time to get propagated through the internet.
Please note that the Apple TV 3 or older Apple TV devices are not compatible with tvOS.