watchOS 6.0 (build 17R5491t) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-06-03T19:29:11Z. The update package is 670.46 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: b15886db9e6b9b6607eac1c8919c84b1fa787d55.zip.