Remove the following 10 screws securing the lower case to the MacBook Pro 13" Unibody:

• Seven 3 mm Phillips screws.
• Three 13.5 mm Phillips screws.

Slightly lift the lower case and push it toward the rear of the computer to free the mounting tabs.

For precautionary purposes, we advise that you disconnect the battery connector from the logic board to avoid any electrical discharge. This step is optional and is not required.

Use the flat end of a spudger to lift the battery connector up out of its socket on the logic board.

Remove two Phillips screws securing the hard drive bracket to the upper case.

These screws are captive to the hard drive bracket.

Lift the the retaining bracket out of the upper case.

Lift the hard drive by its pull tab and pull it out of the chassis, minding the cable attaching it to the computer.

Remove the hard drive cable by pulling its connector straight away from the hard drive.

Remove the two T6 Torx screws from each side of the hard drive (four screws total).

You'll need to transfer these screws to your new hard drive if you're changing drives.

If you are installing a new hard drive, we have an OS X install guide to get you up and running.