The new Macs have something called Boot Camp where you can boot it up as Mac operating system or Windows operating system so then Sims Online would work that way. Hubby is looking into converting all our Pc's into Mac over the next year, hate to tell ya but i think i like my Pc better then a Mac. But then i really would hate to upgrade to Vista with a new computer, heard alot of negative things about Vista. So i guess either way gonna have to learn something new to use either way i go.