About this item 4GB Module ( 1x 4GB ) | DDR3 1066MHz / 1067MHz ( PC3-8500 / PC3-8500S ) | DDR3 SO-DIMM ( 204-Pin ) | Non-ECC Unbuffered | 2Rx8 - ( Dual Rank x8 ) Compatible for MacBook (Late 2008 13 inch), (Late 2009 13 inch), (Mid 2010 13 inch) - Model IDs: MacBook5,1 MacBook6,1 MacBook7,1 | Model #s: A1278, A1342 | Part #s: MB466LL/A, MB467LL/A, MC207LL/A, MC516LL/A | *Requires OS X 10.6.6 or newer and latest EFI updates in order to run 8GB of total RAM Compatible for MacBook Pro (Late 2008 15 inch), (Early 2009 17 inch), (Mid 2009 13/15/17 inch), (Mid 2010 13/15/17 inch) - Model IDs: MacBookPro5,1 MacBookPro5,2 MacBookPro5,3 MacBookPro5,4 MacBookPro5,5 MacBookPro6,1 MacBookPro6,2 MacBookPro7,1 | Model #s: A1278, A1286, A1297 | Part #s: MB470LL/A, MB471LL/A, MC026LL/A, MB604LL/A, MB990LL/A, MC118LL/A, MB985LL/A, MC226LL/A, MC227LL/A, MB986LL/A, MB991LL/A, MC374LL/A, MC375LL/A, MC371LL/A, MC372LL/A, MC024LL/A, MC373LL/A Compatible for iMac (Early 2009 20 / 24 inch), (Mid 2009 20 inch), (Late 2009 21.5 / 27 inch) - Model IDs: iMac9,1 iMac10,1 iMac11,1 | Model #: A1224, A1225, A1311, A1312 | Part #s: MB418LL/A, MB419LL/A, MB420LL/A, MB417LL/A, MC015LL/A, MC015LL/B, MB953LL/A, MC507LL/A, MB950LL/A, MB952LL/A Compatible for Mac mini (Early 2009), (Late 2009), (Mid 2010) - Model IDs: Macmini3,1 Macmini4,1 | Model #s: A1283 A1347 | Part #s: MB463LL/A MB464LL/A MC239LL/A MC408LL/A MC238LL/A MC270LL/A MC438LL/A › See more product details