But I mean on the MBP, the clamshell mode will turn of the monitor while keeping the computer running? And so on the MBP, how do I turn the clamshell mode on?mad jew said:Not quite. Clamshell mode will let you add an external (second) monitor. Then, if you close the iBook's lid, you can just use the external but heat dissipation will be reduced. Unplugging the second monitor should be sufficient to have the iBook running normally but if you want to remove the hack completely, you'll just have to reset the PRAM.