watchOS 6.0 (build 17R6575) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-09-11T18:36:27Z. The update package is 1.35 GB. This is a delta (partial) update that requires 17R5575a already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1c6ad051eb20c9e171f5cd56f4a9da05e34eca5f.zip.