However, you can install it too, on your own Apple Watch, as long as your paired iPhone is running the iOS 11 GM. Else, you can wait until September 19 for the public release of both the 11th iOS generation as well as the 4th watchOS iteration. If you followed us this summer you already know a bunch of the new features included in watchOS 4 as we reviewed them during the beta testing phase. They include new Watch Faces, native Flashlight app, better Siri integration, Skiing workout tracking, manual phone number dialing to accommodate the new LTE functionality of the Apple Watch 3 and much more.
Upgrade To watchOS 4 GM
1. As mentioned above, to be able to install the watchOS 4 Golden Master version you have to update to iOS 11 GM on your iPhone as explained here.
2. Next, open the Apple Watch app on the paired iPhone and display the My Watch tab.
3. Browse for General -> Software Update and tap on Download & Install.
4. Provide iPhone Passcode, Agree with terms and wait until the watchOS 4 GM is deployed and installed on your smartwatch.
Fact: watchOS 4 is compatible with all Apple Watches ever sold!
watchOS 4 GM Release Note
“watchOS 4 brings more intelligence and fitness features to Apple Watch, including a new Siri Watch Face, personalized Activity coaching, new measurements in the Heart Rate app and improvements to the Music experience.”
watchOS 4 GM Full Update Log
Play the YouTube video available below and read the full update log of this software update: