tvOS 12.2.1 (build 16L250) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-04-10T17:06:55Z. The update package is 305.62 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 65f17e62c0a90240a53f6ce7b5936af6fb42d149.zip.