watchOS 3.0 (build 14S5290d) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-07-18T16:53:05Z. The update package is 481.23 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: ddb8435ab4b790d229bcf9c57db4080f2b5f279d.zip.