Brand new iMac wont boot from anything but HD?
Got a brand spanking new 20" imac here that ive been preparing an image on. Wanted to boot off my firewire drive to take said image, I hold down option, select the boot volume, the disk clicks a bit, screen goes black, then grey, then it boots off the internal HD.
Thought it may well be the drive or the partition is screwed or something so went to reinstall OSX on that drive, but it wont boot from DVD either! Does the same, accesses the disc for a second or so, screen blanks, boots to HD. I've tried this with and without the external HD connected.
Why cant I boot off anything?!