I recently upgraded my OSX to El Capitan‎ in the processes of that studio manger did not work with the ES Rack. So i resorted to use the voice bank cubase had. Anyway i came a cross this piece of software called cross over witch install windows apps on your mac without install Virtual PC. So the other day i installed studio manger and the ES Racks software and it worked so now i have Es Rack now fully functional. So what i am saying is if you upgrade there is a way..

Ps i try ed it with some of the voice banks as well and it works.