watchOS 5.0 (build 16R5357a) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-08-20T17:08:38Z. The update package is 610.74 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: 7875fba415f21489ec35d2187949e62669e6588c.zip.