Click the Apple Icon (top left corner) and Select 'About This Mac'
In the new window titled 'About This Mac' click the 'More Info...' button.
Under 'Hardware Overview' you will see 'Model Identifier'. If you are running OS X 10.4.x or lower you will see 'Machine Model' instead.
OWC Makes Upgrading Easy
With the right tools, you can install any memory upgrade or internal drive right in the comfort of your own home. Our free online installation videos show you how quick and easy it is!
Once I've upgraded, what can I do with my original memory or hard drive?
Your old memory or drive may have value! Check the Rebate Center for current trade in offers.