watchOS 6.0 (build 17R5521e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-07-02T18:10:05Z. The update package is 673.83 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: beaf1e60cb02efa770878781fc6654fc3b36c0ad.zip.