A-Tech for Apple 6GB Kit (1x2GB + 1x4GB) DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook (Late 2007, Early 2008, Early 2009), MacBook Pro (Mid 2007, Early 2008), iMac (Mid 2007) - Memory RAM Upgrade at Amazon.com
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Install memory in an iMac - Apple Support
Apple iMac A1224 20" Core 2 Duo 2.4GHz 1GB RAM 320GB HDD No OS | eBay
How to replace HDD/SSD in iMac Mid 2007/Early 2008/Early 2009/Mid 2009 | Mac Cheat Sheet
Install memory in an iMac - Apple Support
iMac (2007-2009) Memory Installation Video - YouTube
Install memory in an iMac - Apple Support
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Memory Upgrades for Apple iMac 2007 - Up to 6GB
2007 Apple iMac 2.4 GHz Core 2 Duo 24-inch 4 GB RAM 2 TB - Office + Yosemite | eBay
CMS 4GB (2X2GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac (Mid 2007) Pc2-5300 - A37 at Amazon.com
CMS 4GB (2X2GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac (Mid 2007) Pc2-5300 - A37 at Amazon.com
A-Tech for Apple 4GB Kit 2X 2GB PC2-5300 667MHz Mac Mini iMac Late 2006 Late 2008 Mid 2007 A1208 MA589LL A1207 MA456LL A1200 MB138LL/A A1176 MB139LL/A Memory RAM at Amazon.com
Apple iMac 24-inch Mid 2007 2.4GHz Intel Core 2 Duo (MA878LL) – UNICOM, Inc.
iMAC 24" Mid 2007 Intel Core 2 Duo 2.8GHz 4GB Ram 500 HD Radeon 2600 (A1225) | eBay
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET