watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-07-17T17:43:27Z. The update package is 660.48 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: e819981a41698a373321fe7ca8c1b50387084f2f.zip.