tvOS 12.0 (build 16J5340e) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-08-06T17:10:45Z. The update package is 652.18 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: a22f597d52de2275756c72cb186c5f015633ff02.zip.