8GB KIT (2 x 4GB) For Apple MacBook Pro Series 2.3GHz Intel Core i7 - (15-inch) (DDR3) (Mid 2012) 2.5GHz Intel Core i5 - (13-inch) (DDR3) (Mid-2012) 2.6GHz Intel Core i7 - (15-inch) (DDR3) (Mid-2012) 2.7GHz Intel Core i7 - (15-inch) (DDR3) (Mid-2012) 2.9GHz Intel Core i7 - (13-inch) (DDR3) (Mid-2012). SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory. Genuine A-Tech Brand. 8GB KIT (2 x 4GB) SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Apple MacBook Pro Series. (See Compatibility List Below)