watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-08-27T17:28:28Z. The update package is 688.33 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f4548d9ead77a7dac5a3014e4bb2cef40830259a.zip.