watchOS 6.0 (build 17R5566a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-08-15T17:17:21Z. The update package is 737.43 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: e1877d1cedfd154b563cf166ebde8ccbe79b3838.zip.