8GB DDR3 PC3-8500 1066mhZ 204Pin SO-DIMM Memory RAM kit (2 x 4GB) for MacBook Pro 13" Aluminum Mid-2009 and 2010 Lifetime warranty 8GB (2 x 4GB) DDR3 PC3-8500 SO DIMM Dataram, a trusted brand name since 1967 100% compatibility guarantee or full money back Compatible with Macbook, Macbook Pro, Imac and Mac Mini that use PC3-1066 memory