watchOS 3.0 (build 14S5321a) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-08-15T16:54:36Z. The update package is 216.55 MB. This is a delta (partial) update that requires 3.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 973f650d117053d013e7ac1caafdb8c45df7e3ed.zip.