tvOS 11.4.1 (build 15M5054b) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-05-31T17:04:00Z. The update package is 52.3 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: 42dedc4598fb0675db612722f1d2ac2a2ab1794a.zip.