watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-08-27T17:29:52Z. The update package is 737.37 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: aac735ef1066a505ae9ada8c4411d93806c297af.zip.