watchOS 9.0 (build 13V5098e) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2016-01-11T22:09:30Z. The update package is 545.86 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: 1e4f3458f4bf26fcad17f076a3f290a9a9480f67.zip.