watchOS 9.0 (build 14S464) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-10-04T17:25:16Z. The update package is 796.67 MB. This is a delta (partial) update that requires 8.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c0a5c1533f7bf5310a9e81cdc617408df5433729.zip.