watchOS 6.0 (build 17R5556d) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-08-07T17:13:59Z. The update package is 239.51 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fdb070599496d2b854e0be34bc3e78d03fa5e0b0.zip.