watchOS 5.0 (build 16R364) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-09-12T19:18:12Z. The update package is 969.9 MB. This is a delta (partial) update that requires 3.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a6402ee453da05b3c3eebdfe7eb51daa9fbecb6d.zip.