watchOS 6.0 (build 17R5546f) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-07-30T17:09:43Z. The update package is 741.08 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: 24e504df9271f6754dcb738e3e64a674afa3f3ed.zip.