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
DDR3 RAM for Late 2009 iMac | MacRumors Forums
Memory Upgrades for Apple iMac 2009 - Up to 32GB
8GB -2x4GB Memory Ram Upgrade for 27" Apple iMac 11.1 Core i5 2.66GHz Late 2009 | eBay
Apple iMac 21.5" All-in-One Desktop Computer i3 3.07GHz 4GB Ram 500GB HDD Mac OS High Sierra MC508LL/A w/ Keyboard & Mouse - GRADE B
Review: Apple's 27" big screen iMac (late 2009) | AppleInsider
16GB Memory Upgrade Kit 2009 Apple Apple iMac
How to Upgrade Memory in a Late 2009 21.5-inch or 27-inch iMac - YouTube
Install memory in an iMac - Apple Support
Apple iMac 27" - Late 2009 Reviews, Pros and Cons | TechSpot
How to Upgrade Memory in a Late 2009 21.5-inch or 27-inch iMac - YouTube
A-Tech 16GB (4 x 4GB) PC3-8500 DDR3 1066/1067 MHz RAM for iMac Late 2009 21.5-inch / 27-inch | 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
Benefits from RAM upgrade to Late 2009 iMac | MacRumors Forums
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. :