watchOS 6.0 (build 17R5546f) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-07-30T17:09:44Z. The update package is 740.22 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8b8538ed1a77a8cfc057027db3a58d4ccb118b86.zip.