watchOS 5.0 (build 16R5363a) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-08-31T17:15:06Z. The update package is 607.04 MB. This is a delta (partial) update that requires 4.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 76e8cda14daf617534683ad6acf8fbe6fa4523e0.zip.