tvOS 13.4.5 (build 17L6562) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2020-05-18T17:21:04Z. The update package is 1.65 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 347b0393a0e641ca1fe9a13ff0953b1b217a8780.zip.