Can't install Aperture 3 from DVD on 10.8.3
I just picked up a new iMac, installed 10.8.3 (updated from 10.8.2 which is what it shipped with) and then popped in a DVD w/Aperture 3. When opening it said it had to reopen the installer (which is weird), and now when I select a destination disk the HD has a warning symbol with the message "Aperture can't be installed on this disk. The contents of this disk can't be changed."
What's going on?