Hi folks~ So I am still one OS behind running 10.5.8. I want to upgrade to Lion, but I can't do that since I haven't yet upgraded to Snow Leopard, so I decided to buy a DVD on ebay (don't say it, I already know). Anyway, as I was running through the installation, I got about midway through and got an error that said the OS was unable to be installed. I contacted the seller who responded that I can't go from 10.5.8 to 10.6. I don't understand why this is? Can anyone shed light on why I can't complete this upgrade?