Your macbook pro has a unique model identifier number that helps us determine what type of RAM is suitable for you. Using your model identifier number, choose from the selection below. If you don't know your model identifier, do the following:
1. Choose About This Mac from the Apple () menu in the upper-left of your screen.
2. Click "More info..." 3. Click "System Report...". Find the model identifier listed in the Hardware Overview under the Hardware section.