I just upgraded to Lion and I have screwed up my ios simulator permissions... You see, when I upgraded to lion I was forced to create a new user, and now all of the Xcode permissions point to that user.
I know this because I can load the ios simulator from that new user just fine, I cannot, however, do this form my original user account -- the simulator DOES open, but it immediately hangs.
I have tried recursively chowning both Xcode.app (which contains my iPhone Simulator.app) as well as the ios application support folder to set my normal account as owner I also chmod'd those same two directories with both a+rwx and a=rwx in that order.
What other files does the ios simulator reference that need to have their permissions updated?
Reinstall Xcode. Here's how: http://osxdaily.com/2012/02/20/uninstall-xcode/