It's been a while since I've been here. I had to reset the PRAM on my MB Pro the other day. I had EOS installed, and it would automatically boot to it (still hadn't figure out how to get the GRUB screen up). I would have to hold down the option key to get the choice to boot into El Capitan. Anyway, after the reset it automatically boots into OS X. I thought i had erased EOS but when I attached the USB stick in order to reinstall it, it noted that EOS was already on the machine. I didn't install and took a look at GPARTED, and sure enough there it was, with the swap file and everything. In OS Disk Utility it showed the mac partition and the other partition for EOS, but was called 'unidentified.' So to my mind there has to be a way to be able to boot into EOS, but I don't know how to do this. Can someone help me out here? If you need more info let me know.