WILLTOP Ram Memory 8GB kit, (2 x 4GB), DDR3 PC3-8500, 1067MHz, 204 PIN SODIMM for Late 2008/2009 and Mid 2010 Macbook's Module Size: 8GB Kit (2 x 4GB) Package: 204-pin SODIMM Feature: DDR3 PC3-8500 Specs: DDR3 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.