Upgrading the memory in your computer is still one of the best ways to boost system performance. Here's how to upgrade the memory in your MacBook Pro:
Remove the bottom cover
Shut down your MacBook Pro and disconnect the power adapter and any other cables connected to it.
Turn your MacBook Pro over so you can access the bottom of the case. Most recent MacBook Pro models require the removal of 10 screws, while some older models will require you to remove the battery to access the screws. Our MacBook Pro (15-inch, mid-2010) has 10 screws. Note that three of the four screws near the hinge are longer than the others.
Remove the old memory
Locate the memory slots on the motherboard. Before handling the memory modules, remember to discharge any static electricity from your body by touching a metal surface, such as your optical drive.
Push the levers located on each side of the memory module outward to release the module. This should pop the memory module out at an angle. Hold the memory module from the notches on its sides and gently pull the first memory module out. Repeat the procedure for the second memory module, located underneath.
Install the new memory
Align the notch on the gold contacts of the memory module to the notch on the bottom memory slot and insert the module at a slight angle.
Push the memory module down until you hear it click into the slot. Repeat the procedure for the top slot.
Screw the bottom cover back on and you're good to go. Boot up your MacBook Pro and select About This Mac from the Apple menu. You should see the new memory amount listed.
That wasn't so hard, was it? Enjoy the performance boost!