tvOS 12.4 (build 16M5537c) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-05-28T17:11:46Z. The update package is 64.55 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 684653e062b7cc53f0261b724c3d435baac4988f.zip.