Hi, I am trying to install OS X Yosemite on my Late 2006 iMac. I have 2GB Ram installed (took out 2GB according to a tip on MacRumors) and a 128GB SSD. I made the installer using MPF 2.0.1, but when I hold down option and choose my installer all I get is the apple logo on a grey background. After waiting 15 minutes I decided to leave it. How can my problem be fixed? Thanks.