Xcode 5 fails to launch app with error: failed to launch '/path/to/.app' -- Busy
My device was completely stuck with black screen. "To fix you have to hard reboot, holding the power and home button until the phone reboots - doesn't lose any of the data you have on your phone (a concern the first time I did it)." as stated here:
http://blog.paulhadfield.net/2014/01/iphone-hangs-when-running-from-xcode.html
For iPhone7 there is a different approach:
- Press and hold down the power button located on the right side ofthe iPhone 7.
- While holding down the power button, press and holddown the Volume Down button on the left side of the iPhone 7.
You were using your phone when you ran the app. Make sure you don't use your phone after you press build and run, otherwise it will be "busy"
Which Xcode version do you use? Same issue with Xcode 5.0.1 + iPhone 5S (iOS 7.0.4). It crashed my iPhone 5S even by the simple application created by Xcode's default project template.
It seems this issue has been fixed in Xcode 5.0.2. Xcode 5.0.2 works fine for me by now.