Can you provide more details on your setup? Saying “I’m having the same problem” isn’t all that helpful.
What version of Corona SDK are you using?
What version of OS-X are you using?
What version of Xcode do you have installed?
Can you post a screen shot of your Build screen just before you hit build? (please don’t blur out any fields)
Can you post the exact error message you’re getting?
Thanks
Rob