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 421.97 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d2d9483e3a86ce677d2b30e9f18def9de2d4c097.zip.