tvOS 13.3 (build 17K5445a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-11-20T18:11:10Z. The update package is 57.77 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1373e3341960078d6ce8a166c3689b94a0c8e337.zip.