watchOS 6.0 (build 17R5566a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-08-15T17:17:19Z. The update package is 244.26 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: e032a6803d65bfe7fa7a4c1adca0b67dff3dde9b.zip.