tvOS 11.4.1 (build 15M73) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-07-09T17:13:38Z. The update package is 61.61 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 26bb9739344584c2b7e3f8f23ab2ab2f3935124d.zip.