driver for DesignJet 450C
Mac mini, OS X Mountain Lion (10.8.2)
Mac mini, OS X Mountain Lion (10.8.2)
Wow... only Windows® drivers!???
I think your best bet is...
Parallels...
VmWare Fusion...
VirtualBox...
http://www.virtualbox.org/wiki/Downloads
Install Windows® using one of those, & have Windows® Share the printer.
Perhaps hooking it up to a HP JetDirect server might also work.
driver for DesignJet 450C