I tried VGA output With the EDP and it worked as an extended monitor but when I selected Mirrored mode it corrupted both monitors and I can't get it back. Now when I unplug the VGA cable it clears up on the laptop, So how can you delete the display prefpane catch to at least have extended mode back. (You can't uncheck mirror mode because of garbled screen and only have access to that option when both screens connected but you cant see it to uncheck it.) It's a damn catch 22!... Maybe a script is in order here .. A little input Guys would help