tvOS 8.1 (build 12B410a) is an official Apple over-the-air update for the Apple TV 3, released on 2014-10-20T17:59:07Z. The update package is 919.13 MB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 17b3462257280cffd8c64b493ac347a24f0fd75b.zip.