tvOS 12.0 (build 16J5340e) is an official Apple over-the-air update for the Apple TV 4K, released on 2018-08-06T17:10:46Z. The update package is 689.99 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: c82e5dc0aaa7ca4da316fece47d3f2fdca605789.zip.