With the case closed, place the Unibody top-side down on a flat surface. Depress the grooved side of the access door release latch enough to grab the free end. Lift the release latch until it is vertical. /Guide/Installing-MacBook-Unibody-Model-A1278-RAM/757/all#s4172 The access door should now be raised enough to lift it up and out of the Unibody. /Guide/Installing-MacBook-Unibody-Model-A1278-RAM/757/all#s4348 Be sure the access door release latch is vertical before proceeding. Grab the white plastic tab and pull the battery up and out of the Unibody. /Guide/Installing-MacBook-Unibody-Model-A1278-RAM/757/all#s4122 Remove the following eight screws securing the lower case to the chassis: One 3 mm Phillips screw. Three 13.5 mm Phillips screws. Four 3.5 mm Phillips screws. /Guide/Installing-MacBook-Unibody-Model-A1278-RAM/757/all#s4127 Using both hands, lift and remove the lower case off the upper case. /Guide/Installing-MacBook-Unibody-Model-A1278-RAM/757/all#s4128 Release the tabs on each side of the chip by simultaneously pushing each tab away from the RAM. These tabs lock the chip in place and releasing them will cause the chip to "pop" up. /Guide/Installing-MacBook-Unibody-Model-A1278-RAM/757/all#s4129 After the RAM chip has popped up, pull it straight out of its socket. Repeat this process if a second RAM chip is installed. /Guide/Installing-MacBook-Unibody-Model-A1278-RAM/757/all#s4130