upgrade memory 2009 MacBook-pro w/2.53GHz
Have 4GB memory & would like to have 8..Do I have 1 4GB or 2X2 GB installed?...IE do I need one 4GB or 2X4GB to get to 8? mid 2009 Macbook-pro 5.5 with 2.53GHz Processor.
thanks, Jack
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