watchOS 6.0 (build 17R5566a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-08-15T17:18:02Z. The update package is 707.27 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: 2af52a2ff3be3780fb436079febc8c0b606e9e13.zip.