watchOS 9.0 (build 14V753) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2017-07-19T17:01:22Z. The update package is 832.39 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: 5110dbd1c5f9d7fcab8e5d4550e9cc22d1721cb8.zip.