Use a coin to rotate the battery-locking screw 90 degrees clockwise. /Guide/Installing-MacBook-Core-2-Duo-RAM/512/all#s2425 Lift the battery out of the computer. /Guide/Installing-MacBook-Core-2-Duo-RAM/512/all#s2426 Unscrew the three evenly-spaced Phillips screws from along the rear wall of the battery compartment. The screws are captive to the metal memory cover so you cannot lose them. /Guide/Installing-MacBook-Core-2-Duo-RAM/512/all#s2427 Rotate the L-shaped memory cover so it clears the battery compartment opening and lift it up and out of the computer. /Guide/Installing-MacBook-Core-2-Duo-RAM/512/all#s2428 Pull back on the metal lever and slide the RAM chip out from its compartment. Unlike the iBook line, the MacBook has two RAM slots. When installing RAM, be sure to push the chips in firmly or else the computer will not register them. /Guide/Installing-MacBook-Core-2-Duo-RAM/512/all#s2429