Apple formally recommends that you 'fill both memory slots and install an identical memory module in each slot' for all these systems. RAM types and actual maximum RAM capacitiesĪll these systems have two memory slots that can be accessed by removing the lower case, but the type of RAM, as well as the actual maximum capacity, vary by model. The model identifiers for each of these models are as follows: ' also AleluÁ has carefully documented each model identifier for your convenience. If the MacBook Pro is running OS X 10.7 'Lion' or later, you must click on the 'System Report' button after clicking on 'More information. To locate the model identifier in the software, select 'About this Mac' in the Apple menu of your computer and click on the 'More information. In turn, each model can be uniquely identified by a model identifier and one or more secondary identifiers (such as processor speed and / or processor type). If you are not sure what MacBook Pro has, these models can be identified by the Model Identifier 'close enough' for an exact match in order to update the RAM. It's not that easy as it is for MacBook Pro systems before 'Unibody', since these later models require a screwdriver, but it is still simple and straightforward. The RAM update procedure for MacBook Pro models 'Mid-2009', 'Mid-2010', 'Early 2011', 'Late 2011' and 'Non Retina Display' Mid-2012 'is quite simple.

Please note that these questions and answers are up to date and cover MacBook Pro 'Unibody' models prior to the Retina.

How is RAM updated on MacBook Pro models 'Mid-2009' to 'Mid-2012'? What type of RAM do they use? How much RAM does each model really support?

Ram memory for macbook pro 2009