Boot in your Root User (secret hidden super administrator account), open PrPro, open your project, play with it for a minute, save it, close it, reboot into your every-day user account, and you'll be good to go... it has something to do with the way Mac reads permissions files, and unfortunately the Root User is the only one that can get it to work right. Once the Root User has opened PrPro and (any) project, it should always work right in your standard user account, unless you have to re-install PrPro or have a major update.
