iMac (2007-2009) Memory Installation Video - YouTube
Early 2009 model iMac Computer, DDR3 8GB (2x4GB) RAM Replacement - YouTube
8GB -2x4GB Memory Ram Upgrade 20" Apple iMac 9.1 2.66GHz Core 2 Duo Early 2009 | eBay
16GB 2x8gB RAM Memory for Macbook Pro MacMini iMac 2009 2010 DDR3 1066 PC3 8500 | eBay
Memory RAM Upgrade for Apple iMac 20-inch Early 2009 4GB DDR3 SODIMM | eBay
A-Tech for Apple 2GB DDR3 1067MHz / 1066MHz PC3-8500 SODIMM Memory RAM Module for MacBook, MacBook Pro, iMac, Mac Mini - (Late 2008, Early 2009, Mid 2009, Late 2009, Mid 2010) Models at Amazon.com
A-Tech for Apple 1GB DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook, MacBook Pro, iMac, Mac Mini - (Early/Mid/Late 2006, Mid/Late 2007, Early 2008, Early 2009) - Memory RAM Module at Amazon.com
8GB KIT 2X 4GB Apple iMac 2.0GHz 20" Mid 2009 2.66GHz 20" MB417LL/A Early 2009 2.66GHz 24" MB418LL/A Early 2009 2.66GHz 27" Late 2009 2.8GHz 27" Late 2009 2.93GHz 24" MB419LL/A Early
How to UPGRADE Ram on iMac (2009-2011) - YouTube
Install memory in an iMac - Apple Support
Memory Upgrades for 2019-2020 iMac 27-Inch - Up to 128GB
CMS 16GB (4X4GB) DDR3 8500 1066MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Apple® Imac Core 2 Duo 3.06 21.5" Late 2009 Mc413Ll/A - A33 System Specific Memory - Newegg.com
OWC 16GB (4 x 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory Compatible with iMac 21.5" and 27" (October/2009) at Amazon.com
How to Upgrade Memory in a Late 2009 21.5-inch or 27-inch iMac - YouTube
How to Upgrade the RAM in Your iMac
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