Install memory in an iMac - Apple Support
iMac Intel 27" EMC 2309 and 2374 RAM Replacement - iFixit Repair Guide
apple-history.com / iMac (Late 2009)
iMac (Early 2009) | Low End Mac
iMac Intel 27" Late 2009 EMC 2309 - used original spareparts for Macs
iMac (2009) RAM & Storage Upgrades
iMac (21.5-inch, 3.33GHz Intel Core 2 Duo, Late 2009) | iGotOffer
How to Upgrade Memory in a Late 2009 21.5-inch or 27-inch iMac - YouTube
iMac "Core i5" 2.66 27" (Late 2009) Specs (Late 2009, MB953LL/A, iMac11,1, A1312, 2374): EveryMac.com
apple-history.com / iMac (Late 2009)
iMac (2007-2009) Memory Installation Video - YouTube
Apple iMac 27-inch & 21.5-inch Late 2009 RAM Memory - Macfixit Australia
Apple iMac 3.0Ghz Core 2 Duo 21.5-Inch (Late-2009) *No HDD/RAM* – MSU Surplus Store
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
Understanding RAM Speed Differences and Upgrades - Mac Optimization Software Reviews
Install memory in an iMac - Apple Support
Apple iMac A1311 21.5" Desktop - MB950LL/A (October, 2009) for sale online | eBay
Memory Upgrades for Apple iMac 2009 - Up to 32GB
iMac | 3.06 GHz Core 2 Duo | 21.5 Inch | Late 2009 - Techable.com
Can the Late 2009 27" iMac handle 32GB of RAM? | MacRumors Forums
iMac | 2.66 GHz Intel i5 | 27 Inch | Late 2009 - Techable.com
Late 2009, 27 inch iMac can use 32 GB of 1333 MHz RAM, beyond what Apple says - YouTube
A-Tech 32GB (4 x 8GB) PC3-8500 DDR3 1066/1067 MHz RAM for iMac Late 2009 27-inch (Quad-Core i5/i7) | 204-Pin SODIMM Max Memory Upgrade Kit at Amazon.com
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
Catalina 10.15.3 running decent on my mid 2009 iMac. Gonna max out the RAM to 8GB. 🤗 : r/CatalinaPatcher
