Corsair Apple Certified 16 GB (2x8 GB) DDR3 1600MHz (PC3 12800) Laptop Memory 1.35V Density: 16GB (2x8GB) Speed: 1600MHz Timing: 11-11-11-30 Limited Lifetime Warranty Corsair's Mac memory kits are tested at Apple Developer Compatibility Labs and work with most MacBook Pro, iMac, and Mac mini systems shipped in 2011 and newer.