watchOS 3.0 (build 14S326) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-09-07T21:33:17Z. The update package is 561.68 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: 2dec1f6d2599ea7012904a3410985016a9733daf.zip.