I am trying to install Yosemite on my Early 2011 Macbook Pro (i7, 8GB RAM). I have two internal drives, I have a 1TB Fusion HDD and a 250GB SSD. I am attempting to install Yosemite onto the SSD. I've had Yosemite installed on the SSD before and had the HDD running before, so I'm certain that this is unrelated to the physical installation of the SSD which was about a year or so ago. I've tried several times to wipe the SSD and install Yosemite on it (the HDD is empty too). The drive is formatted correctly for installing Yosemite. Each time it has downloaded Yosemite, installed it, and when it restarts I get the circle with the line thru it screen. I've verified and repaired each disk several times. I've also tried restoring from a Time Machine backup and I get the same circle with the line thru it. I've restored from this Time Machine before so I'm pretty sure the backup is not the issue. The problem appears to be with the Yosemite installation. I've tried every trick that I can find online and I'm at a loss for what to do. I can't install an OS, so I can't do anything at all. The SSD is a Crucial BX100. Do I need to do something to the drive before it can have Yosemite installed on it? How would I go about doing that with no OS installed on either drive? Thank you in advance for your help.