"Check with the developer to make sure iTunes works with this version of Mac OS X. You may need to reinstall the application. Be sure to install any available updates for the application and Mac OS X." I have no idea what it could be. I've tried deleting iTunes and re-installing the beta AND 10.3 w/ cloud but nothing seems to be working. I kinda need to sync my phone and put some new music and whatnot on it but I can't get it open. Thanks in advance guys.