tvOS 8.3 (build 12F69) is an official Apple over-the-air update for the Apple TV 3 (2013), released on 2015-04-08T17:56:05Z. The update package is 482.59 MB. This is a delta (partial) update that requires 7.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9dfaa30b045157f6ff56fa7d80676d99be8c8047.zip.