watchOS 6.0 (build 17R5491t) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-06-03T19:28:50Z. The update package is 679.07 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: aabcad39a15546c2354c29ed562887edd02d48ca.zip.