watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-08-27T17:31:34Z. The update package is 361.98 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: 383c0ace5a27ebed27dd82e2f9a9481ec9abf430.zip.