watchOS 6.0 (build 17R5491t) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-06-03T19:28:35Z. The update package is 724.77 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 87fe26a3a736ac78146eeb633cea8728720b1246.zip.