watchOS 6.0 (build 17R5556d) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-08-07T17:14:25Z. The update package is 709.09 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: 107613ce80558084c614141d072a1ffc78f29bf9.zip.