watchOS 6.0 (build 17R6575) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-09-11T18:36:54Z. The update package is 388.94 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7c555b00f7a1fd7f6c2821cf00ce6773df72154b.zip.