Xcode 4.2. gets stuck “Attaching to myapp” when running

Question

In xcode 4.2, sometimes when you\'re going to run your ios proj on simulator, the status windows says \"Attaching to myapp\", and just gets stuck there... until you cancel. Now,

Answer 1

I tried all of the solutions above but without luck ... When I search for simular problem here : Xcode error: failed to launch [directory] -- invalid host string: 'localhost'

I found it fixed my problem! Hope this helps those who are still searching for a clue .