watchOS 3.0 (build 14S5315a) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-08-09T16:45:39Z. The update package is 556.51 MB. This is a delta (partial) update that requires 2.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a6ac8da300d4062b6791ef776ac5940223cff029.zip.