I have started a new app a few days ago and began working with the simulator to test it. I started as an empty project and manually added the storyboard. The simulator build
I had similar problem and I was getting the following error.
exception 'NSInvalidArgumentException', reason: 'Could not find a storyboard named 'MainStoryboard_iPhone' in bundle NSBundle
I fixed it by updating the plist file. Simply goto Edit->Find->Find in Workspace and search for "story". Now update the appropriate name for the story board.