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
Apple iMac 6 GB RAM Apple Desktops 500 GB SSD Capacity-In-One Computers for sale | eBay
OS X El Capitan on an Older Mac: What You Should Know
CMS 4GB (2X2GB) DDR2 5300 667MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Apple® Imac (Mid 2007) Pc2-5300 - A37 System Specific Memory - Newegg.com
The infamous 2007 iMac on Catalina | MacRumors Forums
How to Upgrade iMac RAM (20" and 24" Aluminum): EveryMac.com
iMac 20" Mid 2007 🔥WITH T9500 CPU UPGRADE🔥 MAX 6GB RAM, 480GB SSD 10.11 OSX | eBay
iMAC 20" mid 2007 w el Capitain, 6GB Ram, 320GB HDD /READY TO GO../good working! | eBay
MemoryMasters 6GB (4GB + 2GB Memory Upgrade Kit) Memory RAM for Apple iMac 2007 7,1 at Amazon.com
parts-quick 6GB (4GB + 2GB) Memory for Apple MacBook Pro, iMac 2007 2008 Compatible PC2-5300 667MHz DDR2 SODIMM at Amazon.com
MemoryMasters 6GB (4GB + 2GB Memory Upgrade Kit) Memory RAM for Apple iMac 2007 7,1 at Amazon.com
6GB Kit (4GB + 2GB) Memory for Apple MacBook Pro iMac 2007 2008 PC2-5300 667MHz DDR2 SODIMM (MemoryMasters) - Walmart.com
Memory Upgrades for Apple iMac 2007 - Up to 6GB
iMAC 20" mid 2007 w el Capitain, 6GB Ram, 320GB HDD /READY TO GO../good working! | eBay
Memory Upgrades for Apple iMac 2007 - Up to 6GB
Managed to pick this 2007 iMac for $20 on OfferUp today that was stuck in recovery mode... several hours later it's back up and running again :) : r/mac