watchOS 6.0 (build 17R5546f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-07-30T17:09:40Z. The update package is 730.88 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3a127d6375ba08c00fd3f0b3315d30870fbeedda.zip.