watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2019-07-17T17:43:30Z. The update package is 712.1 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: 4232c0d89d96ba1ed22e8c67373947802e09cd02.zip.