Step 4 — Upper Case
Remove the three Phillips screws in the battery compartment near the latch. Apple was nice enough to tilt these screws at a slight angle to make them easier to remove.
Step 5
Remove the following six screws:
Two T6 Torx screws on either side of the RAM slot.
Four Phillips screws along the hinge.
Step 6
Remove the four Phillips screws on the port side of the computer.