Hey guys i forgot how to keep the my macbook laptop on while keeping it closed. I use an external monitor via mini DVI and connect it to 24 inch monitor. So i don't ever really look at my laptop screen. How do I keep it on with the laptop closed?
Don't use software to keep your MacBook on when the lid is closed. For one, heat is dissipated partially up through the keyboard by convection. Keeping the lid closed all the time will raise the temperature a few degrees. For short periods of time it should be OK. Long term, not recommended.
You can operate your MacBook in clam shell mode easily:
1. Purchase an Apple external keyboard. ($49.99) and any good quality mouse. (I use a Logitech wired optical which cost $15.00 at Wal-Mart)
2. Hook up your external monitor via DVI or VGA mini cable. Attach the external keyboard to the MacBook and the mouse to the USB port on the keyboard.
3. Go into display preferences and set your external monitor to mirror mode and the correct native resolution.
4. Keep the external monitor off.
5. Close the lid of your MacBook and let it go to sleep.
6. Tap a key on the external keyboard. The MacBook wakes up but its internal monitor remains off.
7. Turn on the external monitor. It should display in its native resolution.
8. Open the lid on your MacBook. The internal monitor should remain off.
I do the exact same thing as above when I use my MacBook at home. It functions as a desktop.
Regards.