Just spent 20~30 minutes waiting on Disk Warrior CD to startup on my 2011 21.5 iMac. It came with Lion, but I've upgraded to ML. The CD has 10.6 on it for a system. I *think* my iMac needs 10.7+ to run. Could that be why it takes so long to boot up on my iMac? If so, can I do anything about it to speed it up?