I tried to install the Yosemite update on my wife's MacBook Pro that she has been prompted with forever. Being dumb I didn't check the requirements beforehand. Now I'm stuck in a loop of and install that won't complete. The computer is a 2010 and it meets all hardware requirements but it was on OSX 10.4. Now I'm stuck in a install loop that won't complete and I can't get the computer back to normal to install 10.6 which I believe is my problem. If I go into the Disk Utility I see disk 1 OS X Install ESD and disc 2 OS X Base System. Is one of those the attempted Yosemite install that I can delete and back to normal or how else can I fix this?