Hello. Well, I have quite a problem with my 27" imac. Quite a while ago, I installed windows using bootcamp. That worked, and I commonly booted up my mac using the option command and chose the partition. When i went to boot up my IMAC tonight, the windows partition had vanished. I clicked on the mac partition, and the computer froze. I force shut it down, and restarted it. When I hold the option key, the screen pauses, and then goes to the "No bootable device" screen The mac partition and the windows one don't seem to exist anymore. I inserted my MAC OSX CD to reformat, and booted up holding the C key. It still goes to the "No bootable device" screen. No matter what I do, it goes there. In addition, I cannot get the CD out of my drive. No clue what to do, anyone have any suggestions?