I'm having a problem where my MacBook will not startup. I can only start it up in Safe Mode, and there is one more folder I want to back up on an external drive. Is there any other mode I can try to start up in so that I can get this off before I wipe the hard drive? I'm having that "Exited abnormally...respawning/throttling too quickly" thing popping up and I can't find a fix anywhere. Any thoughts?