watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-07-17T17:42:25Z. The update package is 749.85 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: 16f7e86591dc7b7fe44f9633b3c73636ab428686.zip.