watchOS 5.0 (build 16R5363a) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-08-31T17:15:04Z. The update package is 610.42 MB. This is a delta (partial) update that requires 4.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a0ea367a0d69fd4cc5f0196b472e3d9931831c41.zip.