HT201364: OS X Mavericks system requirements
Learn about OS X Mavericks system requirements
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Helpful answers
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Mar 29, 2014 7:48 PM in response to CountPaper111by Kappy,You cannot install Lion or later without at least 2 GBs of installed RAM. Go buy more memory and install it. Otherwise, you cannot upgrade from where you now are.
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Mar 30, 2014 12:35 PM in response to CountPaper111by Eric Root,The consensus seems to be 4 GB is a more realistic minimum.
The 2 places I’ve seen recommended most to buy reliable RAM are below. I have purchased RAM several times from Other World Computing and have always been very satisfied with the product and service.