tvOS 12.1 (build 16J602) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-10-30T17:13:12Z. The update package is 1.14 GB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4a73d9c41bfabc9da00776599c31494b40faa3c4.zip.