I just got my new Mac Mini 2012 2.6ghz quad core. I just finished installing a 128GB Samsung SSD, and I put my 1tb hard drive in the other available slot. I installed 16gb of RAM, and I am planning to create a fusion drive. The Mini turns on, and will boot into the OS. (I'm using the Mini right now to write this). BUT, when I try to boot from a Mountain Lion Install USB I get a "white no smoking sign." I created the disk on my family macbook pro, (with instructions from tldtoday on YouTube) and I tested it on my brother's macbook pro, and it works as it should, so I know it is not a problem with the USB drive. I decided to make a new USB install drive on my Mac Mini incase there was some drivers issue... or something. But the App Store won't let me download the copy of Mountain Lion I had bought previously! "We could not complete your purchase. OSX Mountain Lion is not compatible with your computer." I'm really stuck, does anyone know what I should do?? Thanks!