Two versions of OSX

Good afternoon guys.

I have 2 sessions of osx on my machine 1 is 10.9 the other 10.10 on separate hard drives. When I try to use cubase in 10.10 (which btw was a clone of 10.9 then upgraded to 10.10 to test) I get an error message about the “finger print of my system” . Is there anyway to use C8 on multiple HD on the same computer?