tvOS 11.4 (build 15L577) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-05-29T17:10:05Z. The update package is 832.43 MB. This is a delta (partial) update that requires 10.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: abd32e60ce46d10324c26be04b9220357333e1bc.zip.