tvOS 11.4 (build 15L5546a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-04-17T17:02:50Z. The update package is 1.24 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d87082276d0195ec9442c2be928c39a518b8e2b8.zip.