Timetec 8GB Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 for Mac Book (Mid 2010 13-
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
How to Upgrade Memory in a Late 2009 21.5-inch or 27-inch iMac - YouTube
Is it worth upgrading my ram on a Late 2009 iMac? New iMacs/MacBooks are very pricey. It's currently running on 4GB of RAM & it has a 3.06GHz Intel Core Duo Processor. :