Hello I have a strange problem. I have an old macbook I am trying to restore to 10.4.6. I accidentally put in a newer mac os CD I had laying around and used it to erase the hard drive. But because it is newer than what came on the computer I get a message that says "cannot be installed on this computer." I want to switch the cd for an older version of mac os X, but because the hard drive is wiped, I can only start from the cd that is in there. Opening disk utility and going to eject wont work because that disk is in use running disk utility. Restarting while holding down the eject button does not work either. It seems like I may have to pry the cd out and switch in mac os 10.4.6 while the computer is off, but it seems like there should be a more civilized way.