A-Tech For Apple 4GB Module PC3-8500 Mac mini iMac MacBook Pro MacBook Late 2009 MC516LL/A A1342 MC374LL/A A1278 MC375LL/A MB950LL/A A1311 MB952LL/A A1312 MB953LL/A MC270LL/A A1347 Memory RAM 4GB Module (1 x 4GB) SO-DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For iMac, Mac mini, MacBook, MacBook Pro Models:Late 2009 Mid-2010 MB950LL/A MB952LL/A MB953LL/A MC270LL/A MC374LL/A MC375LL/A MC516LL/A A1278 A1311 A1312 A1342 A1347 iMac10,1 iMac11,1 MacBook7,1 MacBookPro7,1 Macmini4,1