SK Hynix HMT451S6BFR8A-PB NO AA 4GB 1600MHz DDR3 PC3-12800 204 Pin SO-DIMM Laptop RAM Supporting all Windows operated devices with compatible meomory speed , It is also suitable for a wide range of Apple MAC models such as MacBook Pro 2.3GHz Intel Core i7 (15-inch DDR3) Mid-2012, MacBook Pro 2.5GHz Intel Core i5 (13-inch DDR3) Mid-2012, MacBook Pro 2.6GHz Intel Core i7 (15-inch DDR3) Mid-2012, MacBook Pro 2.7GHz Intel Core i7 (15-inch DDR3) Mid-2012, MacBook Pro 2.9GHz Intel Core i7 (13-inch DDR3) Mid-2012, iMac 2.9GHz Quad-Core Intel Core i5 (27-inch, Late 2012), iMac 3.2GHz Quad-Core Intel Core i5 (27-inch, Late 2012, 2013 and mid 2014), iMac 3.4GHz Quad-Core Intel Core i5 (27-inch, Late 2013 and mid 2014), iMac 3.4GHz Quad-Core Intel Core i7 (27-inch, Late 2012), iMac 3.5GHz Quad-Core Intel Core i7 (27-inch, Late 2013 and mid 2014), Mac Mini 2.3GHz Quad-Core Intel Core i7 - Late 2012, Mac Mini 2.5GHz Dual-Core Intel Core i5 - Late 2012, Mac Mini 2.6GHz Quad-Core Intel Core i7 - Late 2012.