A-Tech for Apple 4GB Kit (2X 2GB) DDR3 1067MHz / 1066MHz PC3-8500 SODIMM Memory RAM
iMac Intel 21,5" Late 2009 EMC 2308 - used original spareparts for Macs
Install memory in an iMac - Apple Support
iMac | 3.06 GHz Core 2 Duo | 27 Inch | Late 2009 - Techable.com
Catalina 10.15.3 running decent on my mid 2009 iMac. Gonna max out the RAM to 8GB. 🤗 : r/CatalinaPatcher
8GB -2x4GB Memory Ram Upgrade 21.5" Apple iMac 10.1 3.06GHz Core2Duo Late 2009 | eBay
Memory Upgrades for Apple iMac 2009 - Up to 32GB
Early 2009 model iMac Computer, DDR3 8GB (2x4GB) RAM Replacement - YouTube
iMac (2007-2009) Memory Installation Video - YouTube
OWC 6GB (2GB + 4GB) PC8500 DDR3 1066MHz SO-DIMMs Memory Compatible with Late 2008, Early 2009, Early 2010 MacBook, MacBook Pro Unibody Models, 2009/2010 Mac Mini, 2009 iMac Models at Amazon.com