Xcode 4 hangs at “Attaching to (app name)”

Question

I just upgraded to Xcode 4 and for some reason my app won\'t run in the simulator or iOS device. It was working perfectly in Xcode 3, but all of a sudden now when I press ru

Answer 1

I had the same problem. The issue was there was one more user who was logged in and had the simulator running. Think there can be only one instance of iphone simulator running on a machine even for different users. Hope this info would be useful for somebody :)