watchOS 5.0 (build 16R5303d) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-06-19T17:36:21Z. The update package is 577.56 MB. This is a delta (partial) update that requires 4.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 66e433ff125c083e06190befff49fae5548b949e.zip.