Hi, So I have a MacPro (early 2008), running Mountain Lion on an SSD, and I have Windows 8 set up on a second HD with bootcamp. It was working fine until the other day when I was booted in windows and tried installing Ubuntu in a new partition. I had to cancel the installation partway through, but thought I could just reformat the partition after. Now, when I try to hold down OPTION when turning on my computer it will just boot into windows (the boot option screen does not appear). I have also tried restarting in OS X through the bootcamp application in windows but that just restarts the computer in Windows 8. I am worried I may have messed up the boot record when trying to install Ubuntu, but I can still access all my files on my Mac partition from within Windows so I know it's all there. Thank you for sticking through this long message!