watchOS 6.0 (build 17R5521e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-07-02T18:10:04Z. The update package is 674.04 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: ce8cb5b5b7703b3abbb52f9753d5f6730235ff6f.zip.