watchOS 6.0 (build 17R5491t) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-06-03T19:28:47Z. The update package is 710.37 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: cc2dfcc9d0294c6403a0176aad6fcc668cd4d7f8.zip.