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

New projects were failing to launch in the simulator, getting stuck on the attach step.

This seems to be after Xcode 4.3 was installed, but I can't recall the last new project I created.

This is what worked for me, the clue coming from this thread...

Project->"Edit Schemes"->Run. Change the Debugger from LLDB to GDB

Another computer with the same version of Xcode works fine. Maybe my LLDB is corrupt?