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
OS X El Capitan on an Older Mac: What You Should Know
Apple iMac A1225 24" Core 2 Duo E8135 2.66GHz 6GB DDR3 RAM 640GB HD OS 10.8.5 | eBay
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
iMac Memory Upgrade (2007 Model) - YouTube
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
Apple upgrades its 27" iMac with 10-gen Intel CPUs, new AMD GPUs and doubles RAM capacity: Digital Photography Review
UPGRADED Apple iMac 20" Desktop – WARRANTY – Mac OS – 250GB – Keyboard & Mouse – ASA College: Florida