I just installed a new SSD hard drive on my Mac Book pro late 2009. When I restart the computer with the Yosemite bootable usb using the option key I get a blank screen. What am I doing wrong? any solutions?I just installed a new SSD hard drive on my Mac Book pro late 2009. When I restart the computer with the Yosemite bootable usb using the option key I get a blank screen. What am I doing wrong? any solutions?