After Parallels not recognizing the OS automatically in the image you have the possibility to manually set the OS to FreeBSD. Just click Continue at the bottom right and you are then presented with a menu to select the OS, Other > FreeBSD.
Disclaimer: I ran this procedure myself with FreeBSD 10.1 amd64 ISO on Parallels Desktop 10.1.1 running on OS X 10.1, but should be the same with PDM 9.
Last edited: Dec 12, 2014