watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-08-27T17:30:40Z. The update package is 707.51 MB. This is a delta (partial) update that requires 5.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 89cef1d823146f3526cd636a5f8b1b7c65197b01.zip.