watchOS 6.0 (build 17R5571a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-08-21T17:11:21Z. The update package is 707.81 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 68f7aa7de57077844e8c735ac52ee3ad316e02b5.zip.