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A-Tech for Apple 4GB Kit (2X 2GB) DDR3 1067MHz / 1066MHz PC3-8500 SODIMM iMac (Early/Mid/Late 2009, 20/24 inch, 21.5/27 inch), Mac Mini (Early/Late 2009 Mid 2010) Memory RAM Upgrade at Amazon.com
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Recently acquired $120 Late 2009 i5 iMac 27" to study/code, 24GB RAM / 512GB SSD later, I'm blown away with performance with Catalina Patcher on. : r/mac
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