When plugging my iPhone in and starting the Xcode organizer, a yellow circle next to the device show me that \"This device is busy or otherwise unusable by Xcode.\"
The Orga
This happened to me after updating to iOS 12.0.1.
I deleted the ~/Library/Developer/Xcode/iOS DeviceSupport/ 12.0.1 version folder but that didn't work. After restarting my iPhone it worked. I noticed that Xcode prepared my phone for debugging again, so it must have messed up the first time around.