Is this possible?

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Yes. It is possible when you have an external keyboard, monitor and mouse connected.






2.0GHz MacBook, 15" 1.25GHz/12" 1GHz PBs, 2xPPC Mac minis, 12" iBook G4, Mac OS X (10.4.8) Cube, 2xTAMs, iPod 4G & nano 2G, 1G & 2G iPs, AEBS, AX

Just follow the Apple's directions HERE and you are all set. Those are for a BT KB and mouse and the instructions for USB devices can be found HERE.

You can also try one of a couple of utilities:

Insomnia
Sleepless

Both may be found at www.macupdate.com.



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it should be noted that sleepless and insomnia are extremely harmfull to your hardware, your macbook sleeps for a reason when you shut it, i would give it a couple hours max, until it really overheated, also, insomnia will void your apple warranty, think how fun that would be, trying to explain to the apple guy how it overheated... lol

Austinklo

Saying that the MacBook would seriously overheat after several hours of operating with the Display closed is incorrect.
Actually,the MacBook and MacBook Pro were designed to safely operate with the Display closed.Apple calls it "ClamShell Mode"
As stated,to enable this function,you must connect an external Keyboard,Mouse and Display.
If,when you operate your MB or MBP in ClamShell Mode,it overheats.
Your MB is defective.And you need to contact AppleCare to have it repaired.

As far as the Sleepless and Insomnia Hacks,As of 10.4.8,they no longer work.



Jim

PowerBook G3 500 Mhz "Pismo"/ 2.0Ghz BlackBook 2GB OWC RAM Mac OS X (10.4.8)

That's indeed true. The reliable and Apple-supported way to use your MB or MBP is with external keyboard, mouse and display connected.

Why would Apple give instructions on using your MB with the lid closed if it was harmful?

There is no need for third party apps.