I've tried so many ways of getting my custom built pc to run osx mountain lion and I haven't succeed yet to get it installed I was using multibeast with the ML.app downloaded from the app store I got it to boot to the black tonymac window where it shows the usb so I booted that then formatted the HDD to two partitions one for osx ML and one for windows 7 I then got to the the installation of osx ML went through the setup it rebooted now what I am back at the black tonymac black screen