watchOS 9.0 (build 14S464) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-10-04T17:25:15Z. The update package is 802.35 MB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 636899f5be2529917f4b98e16d2177b97148a4d3.zip.