tvOS 12.4 (build 16M568) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-07-22T19:23:00Z. The update package is 822.58 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4d3754829285dbcab8831a7d98ab15b4901ee551.zip.