watchOS 5.0 (build 16R5363a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-08-31T17:15:47Z. The update package is 62.32 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: f88286e310af737b206662a6882f30c37a9b6796.zip.