tvOS 8.1.1 (build 12B435) is an official Apple over-the-air update for the Apple TV 3 (2013), released on 2014-11-17T18:06:04Z. The update package is 535.94 MB. This is a delta (partial) update that requires 7.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5f94613628bf0486c592c7b0eb52b93eb21f31d2.zip.