watchOS 5.0 (build 16R6364) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-09-12T19:18:22Z. The update package is 375.9 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: 80d5a6b3afea75fe8c39c6b73565a37e555d79d1.zip.