watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-07-17T17:42:21Z. The update package is 721.28 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: 46cb6da635821bdd337a1bdc18516cba95cf92cf.zip.