Step 1: Before you begin 1. Shut down your MacBook. Disconnect the power adapter, Ethernet cable, and any other cords connected to the MacBook, in order to prevent damaging the computer. 2. Turn the computer over. 3. Review and follow MacBook: How to remove or install the battery to remove the battery. Step 2: Remove the bottom case 1. Remove the eight (8) screws that secure the bottom case of your MacBook, and then remove the bottom case. 2. Because the screws are different lengths, note the screw lengths and locations so you can replace the screws correctly. Put them aside in a safe place.