watchOS 5.0 (build 16R364) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-09-12T19:18:14Z. The update package is 763.95 MB. This is a delta (partial) update that requires 4.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 83a39a76cc9533284a7d0013f5e60489e471aebb.zip.