I just updated the Xcode to 5.1.1. today. And after it when i run my application using the iOS 7.1 simulator. Xcode opened the simulator and displayed the status Running app on Simulator. It took too long to open the application. After that i hit the Stop Button on Xcode to kill the application.

And here the problem invoked. Xcode never stopped or played the application on simulator. I kept hitting the "Play" & "Stop" button. But nothing happened.

So, i restarted my Xcode but the same happened. Then, i restarted my Mac, got the same issue. Does anybody knows why this is happening.

Any guidance will be helpful.