tvOS 13.4 (build 17L5245b) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2020-02-26T18:21:46Z. The update package is 135.79 MB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 987a5597f56785073df12d3a681dcdc15e93d647.zip.