tvOS 12.4 (build 16M568) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-07-22T19:23:03Z. The update package is 326.06 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 48111da89c4e63333193c497d4d7e9d486fadfb5.zip.