Ramjet 8GB DDR3 1066MHz PC3-8500 SO-DIMM Kit for Apple iMac 2009 (2x 4GB) 8GB DDR3 1066MHz SO-DIMM (2x4GB) for iMac9,1 and iMac10,1 iMac Model Numbers A1224, A1225, A1311, A1312 Optimized and rigorously tested for Macs All Ramjet products are sold exclusively by the Ramjet Store