I have El Capitan on a bootable DVD. I restart my Mac and hold the option key until the disks come up and I choose EFI Boot (name of the disk is different than what it shows at the time of booting). DVD-ROM starts like a jet and a progress bar pops up. It goes all the way to very close to the end and then DVD-ROM stops and no more progress. I never have installed any OS X and now I am wondering if such a thing is possible at all. I checked the Boot ROM version and upgraded to the last version that matches my mac 8.1.
My question obviously is what should I do?