tvOS 12.0 (build 16J364) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-09-12T19:15:30Z. The update package is 1.23 GB. This is a delta (partial) update that requires 9.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 74bc4325164d3a74d7530f2270a70778936bfc87.zip.