On my 2012 MacBook Pro (15 inch, non retina, i7, 10GB RAM) after successful installation when Mavericks tried to boot, it is freezing there with "Still waiting for root device" (Seen Using CMD + V during boot). Someone please help. My Mac is not usable anymore. Boots in safe mode but freezes in safe mode too. From safe mode reinstalled Mavericks but failed again with same error. If it can't be fixed please let me know if it can be reverted.