watchOS 5.0 (build 16R6364) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-09-12T19:19:29Z. The update package is 356.41 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 59f707327977a85c1cbf7d974dbc593539dc03d9.zip.