watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-08-27T17:30:38Z. The update package is 707.5 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: c9a96f081b4db05f22a4a3b940bd978045f47c76.zip.