tvOS 12.0 (build 16J5360a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-08-27T17:13:39Z. The update package is 654.56 MB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 821afec95c19ef7f3842da28c4370dff3ee73a71.zip.