tvOS 12.1 (build 16J602) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-10-30T17:14:36Z. The update package is 135.21 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 887f7c8477c07fb779dfbd43d1b3c536067ec846.zip.