watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-08-27T17:30:37Z. The update package is 707.65 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: 18c8f951833c4d7f58789b203f6d6308a864233b.zip.