watchOS 6.0 (build 17R575) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-09-11T18:35:30Z. The update package is 710.6 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: 0320e53be8ffbc24ad7e5fd806939abbb2348d9c.zip.