tvOS 12.4.1 (build 16M600) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-08-26T17:18:26Z. The update package is 989.71 MB. This is a delta (partial) update that requires 10.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9414dcc384182e7e5049b98f2a8f28aec8b7a7bf.zip.