tvOS 12.1.2 (build 16K5532a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-12-19T18:20:48Z. The update package is 1.37 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: 49cd68170c9fcf80b2c7d8a6192474b78aa91663.zip.