I got this Powermac G4 MDD [ dual processor 867, 768ram, 80gb] for a real bargain, so i jumped on it! it came with no HDD though, i put in a spare i had and formatted it with my old panther cds. I installed OS 10.3.3 on it and its up and running, i just need to know if OS9 will be necessary, because when i press the option key i get the old OS9 selection screen.