I've got a 3 year old Mac Pro with 4 drive bays. I've added 3 new drives over the last 3 years increasing capacity (lots of movies and photos). My boot drive is only 500 GB and is close to full. I want to move everything from my old boot drive to a new boot drive of larger capacity (and ultimately replace the old boot drive with a new larger drive). I can't figure out how to move OS X from the old boot drive to the new drive. Any help would be appreciated.