watchOS 6.0 (build 17R5521e) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2019-07-02T18:10:35Z. The update package is 697.13 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: 7b2bc42c04df4c629d483269dd01bee28ef5d0ee.zip.