tvOS 9.0 (build 13T5365h) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2015-09-23T17:55:11Z. The update package is 73.7 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: b6fbf18675443669641a86ea175e2bccb5aebe8b.zip.