tvOS 12.1.2 (build 16K5524a) is an official Apple over-the-air update for the Apple TV 4K, released on 2018-12-10T18:19:19Z. The update package is 1.56 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: 961a6f515d2aa2fa732eb30f2da4691ea97d8d60.zip.