watchOS 3.0 (build 14S5247t) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-06-13T19:31:40Z. The update package is 475.93 MB. This is a delta (partial) update that requires 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: f2795d54e6936f1306020ce2a03adaf4c442b752.zip.