Since this is still relevant today, I'm just bringing my grain of salt here. Unfortunately this may not work for everyone. Using the Profile function (Product > Profile / or command + i / or long press on the play button > Profile) seems to hit Xcode with a stick. When Xcode is ready with that, no need to choose a profiling template, you can stop there and run you application. I have not found the need to restart any of the devices, it looks like it's enough to make it work. However when I'm doing that a few times in a row, I may need to restart Xcode. Also in case it doesn't run automatically, you can go to your Apple Watch and open the app. It should be installed and/or updated.