Timetec 16GB KIT(4x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 Dual Rank for iMac (Late 2009 21.5-inch / 27-inch) SODIMM Memory MAC RAM Upgrade for iMac 10,1 and iMac 11,1 at Amazon.com
8GB PC3-8500 RAM for Apple iMac Late 2009 - 27 Inch MC507LL/A Memory Upgrade Module
Apple A1312 iMac 27" Late 2009 Intel Core i5@2.67GHz 16GB RAM 1TB HDD Yosemite
Apple iMac 27-Inch "Core i7" 2.8GHz (Late 2009) A1312 MC507LL/A 16GB R – Coretek Computers
Apple iMac 27-Inch "Core i7" 2.8GHz (Late 2009) A1312 MC507LL/A 16GB R – Coretek Computers