I was wondering it is possible to change the key of a finished project that is all microphone recorded and no midi. I have tried the pitch modulator but it is not smooth in any other key but the original! Is there a plugin or anyway to do this??

depends how much of a pitch change you wish to make to the entire project... you could covert all your tracks into Apple Loops and then change the pitch of each track in the Region Inspector... Logic's Time & Pitch Machine in the Sample Editor applies changes per track and destructively edits the original audio file!! ... or better still, use a tool like Melodyne. It'll give much better results :)

thank you!! Ill try melodyne!

Definitely go for Melodyne. You will get the most transparent results.