tvOS 12.4 (build 16M568) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-07-22T19:23:04Z. The update package is 143.1 MB. This is a delta (partial) update that requires 12.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f774007afe34a92135fa9b2d241e452924f10a14.zip.