Ram memory upgrades 8GB kit (4GBx2) DDR3L PC3 8500 1067Mhz for your 2009 Apple iMac and 2009/2010 Macbook Pro's computer Module Size: 8GB Kit (4GBx2) Package: 204-pin SODIMM Feature: DDR3L PC3-8500 Specs: DDR3L PC3-8500 , CL=7 , Unbuffered , NON-ECC , DDR3-1066 , 1.35V , 512Meg x 64 Lifetime warranty. Scroll down to see compatible models. Please, make sure your Mac supports 4GB DDR3 ram, 1067MHz speed. See guide on the bottom of the listing how to find out memory type on your Mac.