16GB Kit ( 2 x 8GB Modules ) DDR3 1066/1067 MHz ( PC3-8500 ) DDR3 SO-DIMM ( 204-Pin ) Non-ECC Unbuffered Apple Mac Certified Memory RAM Upgrade Designed For Select Apple Mac Systems: MacBook Pro, MacBook, iMac, Mac mini (for a complete list of compatible systems, see the description section) Compatible Apple Order Numbers: MB953LL/A / MC507LL/A / MC270LL/A / MC438LL/A / MC374LL/A / MC375LL/A / MC516LL/A Compatible Apple Model IDs: iMac11,1 / MacBook7,1 / MacBookPro7,1 / Macmini4,1 Compatible Apple Model Numbers/EMC: A1278 (EMC 2351) / A1312 (EMC 2374) / A1342 (EMC 2395) / A1347 (EMC 2364) A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase