tvOS 12.0 (build 16J5364a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-08-31T17:13:59Z. The update package is 656.48 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: 1af30a555334e49eb23796f2b83bbef377b03002.zip.