watchOS 6.0 (build 17R5491t) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-06-03T19:28:46Z. The update package is 710.47 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: 97e9da74ab912207c998f02a225b5229b52dfdb0.zip.