tvOS 9.0 (build 13T5379f) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2015-10-06T17:54:08Z. The update package is 76.83 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 84b79dcc21f895e3e0a2b5ceb0887f1fedb0cc11.zip.