I'm using Xcode 6.1.1. I can't start the iOS Simulator; it throws the error "Unable to boot iOS Simulator".
I tried resetting the simulator, reinstalling Xcode and my restarting MacBook. Nothing worked.
Finally I tried to unset the DYLD_INSERT_LIBRARIES (IOS 8 Simulator unable to boot). But when I try to open the launchd.conf file, it shows a permissions error.