Hi fellow forumers, I have two macs at home and am intending to sell one of them. I have two OSX Snow Leopard upgrade DVDs which I bought to install on both macs (one for each mac). Now that I am going to sell one of them, I would like to reformat the one I am going to sell. Is there any way to find out which dvd I used initially for that mac so I can use it to reformat the computer and also pass the disc to the buyer. Appreciate help quickly. Thanks!