I just recently had an issue with, after several years of waiting, installing the update to Snow Leopard on my MacBook. During the upgrade my hard drive decided that it was time to die, and just quit... I've since bought and upgraded to a 320GB HDD, and now I am having trouble installing OSX onto the new HDD. I, unfortunately, do not have use of the original SuperDrive because it died about two years ago; so I am instead using an external drive. I can boot the system up from the disk, and it does get to the system check, but it just says that OSX can not be installed on this machine. I can use disk utility to check for issues, which it has none, and COULD do just about anything else, but now when it tries to boot from the disc I just get a large circle with a cross through it. Not a picture of a folder, but just a circle with a cross through it. Can anyone help me out here? Or point me to somewhere that can help fix the issue?