iOS Simulator failed to install the application
Solution 1:
Solved the problem
Deleting contents of ~/Library/Application Support/iPhone Simulator and re-run the project solved this problem.
or you can simply reset content and setting of the simulator.
Solution 2:
Try manually launch the iOS Simulator and from the "iOS Simulator" menu, click "Reset content and settings", then close and rebuild your app.
Solution 3:
My solution is:
From menu, iOS Simulator, Reset Content and Settings. Close XCode 5.0: close project and close it from Dock and re-open the project and launch again, like in Windows :)