watchOS 6.0 (build 17R6575) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-09-11T18:36:23Z. The update package is 393.4 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: 76c0264711060d7d214666a4c08e6ea45c190f90.zip.