mac book pro won't go into clamshell mode

Discussion in 'MacBook Pro' started by brandontod97, Aug 18, 2011.

  1. brandontod97 macrumors newbie

    Aug 10, 2011
    i have a macbook pro 13 inch mid 2009 and when i plug in my display (a vizio tv) using the mini dvi or what ever port apple uses for displays my mac doesn't go into clamshell mode when i close it and i don't know what pleases help i am running mac lion 10.7 :confused:
  2. ergdegdeg Moderator emeritus


    Oct 13, 2007
    Do you also have an external keyboard/mouse connected? You'll need to use those to wake up the computer once you close the lid.
  3. alFR macrumors 68020

    Aug 10, 2006
    Not on Lion - the laptop will stay awake when the lid closes, the internal screen will go off though. OP, what exactly do you mean by it won't go into clamshell mode? Does the laptop screen stay on? No display on the external screen?
  4. Taz Mangus macrumors 68040

    Taz Mangus

    Mar 10, 2011
    Make sure that the power source is connected to the MacBook Pro. I don't think it will work correctly until the power source is connected.
  5. harcosparky macrumors 68020

    Jan 14, 2008


    I had to connect the external power to get it working on my 2011 MBP.

Share This Page