watchOS 6.0 (build 17R5556d) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-08-07T17:15:25Z. The update package is 720.85 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: eed7e78f0934f55ebe1cae0dea48f389effb9e97.zip.