Hello fellow members. I am creating my first thread hoping you guys can help me out here. I decided to replace my hard drive with one that was an external 2.5 hdd. After completing the switch, I went to boot my mac mini with my bootable mountain lion usb/disk and only the bootable usb showed up. When I go to click the bootable disk, it gives the white screen with the prohibited sign instead of the apple sign. If I let it boot without holding the option key, then it gives me a folder with a question mark. I tested it on my mbp, and it shows my external, Mac hard drive, and the bootable usb. What is happening here? Did I mess my mini up? *created my bootable with lion disk maker Thanks in advance.