tvOS 12.1.1 (build 16K5045a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-11-29T18:09:22Z. The update package is 30.07 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0e9c1be04e972961d3e00fe63be9e320d90e899d.zip.