Debugger  on MacBook Air I was updating my iTunes and left my MacBook Air open to finish and restart. When I came back a few hours later my Mac was showing the grey apple screen with the apple and then black lines of code down the left side of the screen. It said debugger "Unable to find driver for this platform: ..." And then kernel version Darwin kernel version kernel UUID kernel slide and kernel text base.

I have no idea what has happened. I thought it was a kernel panic but my screen looks nothing like any screen that shows up when I research kernel panic. I've rebooted it in safe mode and just normally about 20 times. Nothing is changing it.

Can someone please help?
Did this happen after a system update perhaps?
It seems that a lot of people have similar problems after the "Thunderbolt update" from Apple.

check this  thread