hi there.. just a quick question.. what is the difference between a retail install discs and a family pack? i am deciding to buy an mac os x and i am a little confused.. copied from the description of the seller: this is the retail disk and can be installed on any computer that has the system requirements outlined below. copied from the seller: This Family Pack allows usage on up to five Mac computers in one household. that's the 2 OS's i'm confused about.. so, the first one is like an unlimited client? and i can install it on an unlimited number of computers? and the other is limited to only 5? therefore, it's better to buy the first one right?