CMS 4GB (2X2GB) DDR3 8500 1066MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Early 2009 LAT 2009 Core 2 Duo DDR3 1067 MHz RAM - A47 at Amazon.com
iMac (2009) RAM & Storage Upgrades
Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 for Mac Book, Mac Book Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) SODIMM Memory MAC RAM Upgrade
Memory RAM Upgrade for Apple iMac 20-inch Early 2009 4GB DDR3 SODIMM | eBay
8GB Kit (2 x 4GB) PC3-8500 RAM for Apple iMac Late 2009 - 21.5 Inch BTO/
Timetec Hynix IC 32GB KIT(4x8GB) Compatible for Apple Late 2009 iMac 27inch DDR3 PC3-8500 1067MHz/1066MHz CL7 204 Pin 1.5V Dual Rank 2R8 Memory Module RAM Upgrade for iMac 11,1 (32GB KIT(4x8GB)) -
iMac (2007-2009) Memory Installation Video - YouTube
CMS 4GB (1X4GB) DDR3 8500 1066MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Apple® Imac Intel Core 2 Duo 20" 2009 - A34 - Walmart.com
iMac (2009) RAM & Storage Upgrades
Install memory in an iMac - Apple Support
iMac 21.5" Late 2009 (10,1) - CPU Upgrade E8600 | MacRumors Forums
4GB DDR3 1066 SODIMM for Apple iMac (2009), MacBook Pro (2009, Mid 201 – Aplus Technology
How to Upgrade the RAM in Your iMac
Memory Upgrades for Apple iMac 2009 - Up to 32GB
How to Upgrade Memory in a Late 2009 21.5-inch or 27-inch iMac - YouTube
OWC 16GB (4 x 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory Compatible with iMac 21.5" and 27" (October/2009) at Amazon.com
Install memory in an iMac - Apple Support
How to Improve Multitasking with an iMac Ram Upgrade?