Corsair Mac Memory Upgrade Kits: Guaranteed Performance, Compatibility, & Support. This DDR3 SODIMM format is compatible with virtually all modern Mac computers. One of the best ways to improve your Mac's performance Applications use memory, & some of the applications that run best on the Mac — photo & video editing — use lots of it. That's why outfitting your Mac with a Corcair Mac Memory upgrade kit is one of the best things you can do to maximize your system's performance & agility. With a Mac that's been upgraded to the maximum amount of memory it supports, you'll spend less time waiting for your applications to buffer data to the hard drive, & more time working — or playing. Upgrading memory can also be a cost-effective way to get more life out of your older system: before you trade up to a new one, just upgrade the memory. Tested at Apple Developer Compatibility Labs for Guaranteed Performance Corsair's Mac memory kits are tested at Apple Developer Compatibility Labs & work with most Mac Book Pro, i Mac, & Mac mini systems shipped in 2011. Limited lifetime manufacturer warranty, support & service Corsair has been making high-performance memory for just about as long as high-performance memory has existed. Countless customers worldwide rely on Corsair for performance, reliability, & value. Our reputation is important to us, & that's why all Corsair DRAM products are backed by a limited lifetime manufacturer warranty. Crucial Known Compatibility list for CMSA8GX3M2A1333C9 17" Mac Book Pro Intel Core i 7 MC725 2.2 G Hz QC Core i 7 (Early 2011) 15" Mac Book Pro Intel Core i 7 MC723 2.2 G Hz QC Core i 7 (Early 2011)15" Mac Book Pro Intel Core i 7 MC721 2.0 G Hz QC Core i 7 (Early 2011) 13" Mac Book Pro Intel Core i 7 MC724 2.7 G Hz DC Core i 7 (Early 2011) 13" Mac Book Pro Intel Core i 5 MC700 2.3 G Hz DC Core i 5 (Early 2011) 17" Mac Book Pro Intel Core i 7 MD311 2.4 G Hz QC Core i 7 (Late 2011) 15" Mac Book Pro Intel Core i 7 MD318 2.2 G Hz QC Core i 7 (Late 2011) 15" Mac Book Pro Intel Core i 7 MD322 2.4 G Hz QC Core i 7 (Late 2011) 13" Mac Book Pro Intel Core i 5 MD313 2.4 G Hz DC Core i 5 (Late 2011) 13" Mac Book Pro Intel Core i 7 MD314 2.8 G Hz DC Core i 7 (Late 2011) 27" i Mac Intel Core i 5 MC814 3.1 G Hz QC Core i 5 (Mid 2011) 27" i Mac Intel Core i 5 MC813 2.7 G Hz QC Core i 5 (Mid 2011) 21.5" i Mac Intel Core i 5 MC812 2.7 G Hz QC Core i 5 (Mid 2011) 21.5" i Mac Intel Core i 5 MC309 2.5 G Hz QC Core i 5 (Mid 2011) Mac Mini Server Core i 7 MC815 2.0 G Hz QC Core i 7 (Mid 2011) Mac Mini Core i 5 MC816 2.3 G Hz DC Core i 5 (Mid 2011) Mac Mini Core i 5 MC936 2.5 G Hz DC Core i 5 (Mid 2011)