Hello, How are you? I am thinking about buying a late 2012 iMac. I am looking at the 3.4 i7, 27 inch with 1tb fusion drive and the 680M 2gb. This iMac comes stock with Mountain Lion. I would of course upgrade to Yosemite, but I would like to do two things, if possible. The first is to do a clean Yosemite install. That can be done by downloading Yosemite and creating a bootable USB drive to install, right? But the other thing I would like to do is to break the Fusion Drive and have two separate drives. The SSD to install Yosemite to, and the HDD as a separate drive. Is this possible? How can it be done? I saw online some things about breaking fusion drive on the 2012 iMac, but it was old information and only mentioned Mountain Lion and using terminal. How is it done with Yosemite and clean install? Cheers! and thanks!