Ram memory upgrades 8GB kit (4GBx2) DDR3 PC3 8500 1067MHz for your 2009 / 2010 Apple Macbook Pro & iMac Module Size: 8GB Kit (4GBx2) Package: 204-pin SODIMM Feature: DDR3 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 note, that 1066Mhz is actually 1066.66,Crucial drops .66,but Mac reads it as 1067Mhz.