iMac (2007-2009) Memory Installation Video - YouTube
Apple iMac (27-inch, unibody, 2009) review: Apple iMac (27-inch, unibody, 2009) - CNET
Install memory in an iMac - Apple Support
iMac | 3.06 GHz Core 2 Duo | 27 Inch | Late 2009 - Techable.com
Apple iMac 3.0Ghz Core 2 Duo 21.5-Inch (Late-2009) *No HDD/RAM* – MSU Surplus Store
Can the Late 2009 27" iMac handle 32GB of RAM? | MacRumors Forums
A-Tech 16GB Kit (2x8GB) DDR3 1066MHz / 1067MHz PC3-8500 SODIMM RAM for Apple MacBook (13 inch, Mid 2010), MacBook Pro (13 inch, Mid 2010), iMac (27 inch, Late 2009), Mac Mini (Mid 2010) at Amazon.com
How to Upgrade Memory in a Late 2009 21.5-inch or 27-inch iMac - YouTube
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
Install memory in an iMac - Apple Support
2009 27" iMac Core i7 can take (2x8GB) 16GB DDR3 1600Mhz RAM? | MacRumors Forums
A-Tech 16GB (2 x 8GB) PC3-8500 DDR3 1066/1067 MHz RAM for MacBook (Mid
8GB -2x4GB Memory Ram Upgrade 21.5" Apple iMac 10.1 3.06GHz Core2Duo Late 2009 | eBay
Install memory in an iMac - Apple Support
Early 2009 model iMac Computer, DDR3 8GB (2x4GB) RAM Replacement - YouTube
iMac 21.5" Late 2009 (10,1) - CPU Upgrade E8600 | MacRumors Forums