This is a important question to me since I am in the market for buying a imac soon. I want a 24 inch model, 2.16 Ghz or 2.33 Ghz with 3 GB ram, and a 256 MB Ram Video card with a 500GB or 750 GB Harddrive. I seen the Leopard demo today and it is awesome. It is 64 bit but will it work with the current imacs that are out like the one I wish to purchase? Please advise. Thanks.