MacBook Unibody Model A1278 Lower Case Replacement

Replace the aluminum bottom case in a MacBook Unibody.

Edit Step 1 Access Door  ¶ 

Image 1/1: Depress the grooved side of the access door release latch enough to grab the free end.  Lift the release latch until it is vertical.

Edit Step 1 Access Door  ¶ 

  • 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.

Edit Step 2  ¶ 

Image 1/1:

Edit Step 2  ¶ 

  • The access door should now be raised enough to lift it up and out of the Unibody.

1 Edit Step 3 Battery  ¶ 

Image 1/1: Grab the white plastic tab and pull the battery up and out of the Unibody.

1 Edit Step 3 Battery  ¶ 

  • 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.

2 Edit Step 4 Lower Case  ¶ 

Image 1/1: One 3 mm Phillips screw.

2 Edit Step 4 Lower Case  ¶ 

  • 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.

Edit Step 5  ¶ 

Image 1/1:

Edit Step 5  ¶ 

  • Using both hands, lift and remove the lower case off the upper case.

Conclusion

To reassemble your device, follow these instructions in reverse order.

Now that you've finished, share your repair story with others.

Write a story

4 Comments

Is there a way to get replacements for the rubber feet without replacing the entire lower case and access panel?

akwest89 - Reply

Great tutorial ! great step !

Leo Etcheverry - Reply

On my model, it seemed the top-left was 3.5mm and the bottom 4 were 3 mm.

Jim - Reply

Make sure you have a good quality Phillips screwdriver. Mine had removable tips and had a small play at the connection. As a result I didn't have a good feel and damaged my screws (those securing the fan and the top left in step 23). Game over for me installing new thermal paste...

Be very carefull with your screws! Especially those on the inside.

Nickolas Michelinakis - Reply