watchOS 6.0 (build 17R5507l) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-06-17T17:12:05Z. The update package is 684.77 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: dae101b972bfdbbe0e298fedb2ed4bd9c98a20f0.zip.