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Does anyone know if you can use a MacBook Pro or MacBook Air with the display closed, when connected to a HDTV via HDMI or Thunderbolt?

Update:

Here is how to do it:


Requirements for closed display mode:

Power adapter
External keyboard, mouse, or trackpad
External display
Use these steps to enable closed clamshell (display closed) mode:

If you are using a wired keyboard and mouse:

Make sure the computer is plugged in to an outlet using the AC power adapter.
Connect a USB keyboard and mouse to your computer.
With the computer turned on connect the Apple portable (using the appropriate Apple adapter if necessary) to the appropriate port on the external display or projector and turn the display or projector on.
Once your computer's Desktop appears on the external display, close the computer's lid.
Once the lid is closed, wake the computer up by either clicking your mouse button or by pressing a key on your external keyboard.


Thanks for all the help! :)


#Mac #Tip
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24 comments
 
You need also ext keyboard (and mouse) and ac adapter plugged in as it says in the above article
 
Yes.. you need to do extra shit for mac.
 
Or any other computer for that matter :)
 
Except any computer with an Nvidia card (that i'm using) with a non Mac bios. Switch to external only and close..
 
Yes, start your MBP, connect ext display AND keyboard and Mouse (wireless if you want), close display, wait until the computer goes sleepmode, press any key on keyboard to wake up and now it works with ext display and closed computerdisplay.
 
+Peter yes of course I have a keyboard and touchpad connected then, because I can't use the MacBook anymore. Thanks for your answer :)
 
So it was much easier than I thought then. Just connect the stuff and close the lid! It can't be easier than that :) Thanks all.
 
Yes! when I first got my MBP I think the same as you and now its so easy... as many things with the Mac :-)
 
I haven't tried this for years (I prefer double screen usage), but that is what happened in the past. May be screens are more robust now, but you might want to check first 
 
I think you can open it after the process we told you and its still dark but open so the heat can go out.
 
Ok. I will search around to see if that is a problem still. Thanks for the "warning" :)
 
+lars yes probably but then I loose the purpose with having it closed to take smaller space.
 
to you +Jean-Charles Verdié , the problem with dual screen is that the external display is never main screen with menues etc. If I close the the computer display I get the topmenu on my big external screen. Can you choose what display (internal or external) is gona be main display?
 
+Lars Yes everything Apple does is just so easy. It just works :)
 
In display setting you can choose which display that should be the main display.
 
OK I havent seen that, must look again, thanks Stefan!
 
+Lars in display settings simply move the White bar qt the top froone screeto the other, it will become your main screen with menu et al :)

However I'm a little disappointed with dual screen management in lion. Basically for a full screen zoom you get the second screen black. I'm yet to think about what I would want, but it's definitely not this.
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