Can the Late 2009 27" iMac handle 32GB of RAM? | MacRumors Forums
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
Apple iMac 21.5" A1311 Core 2 Duo 3.06 GHz - Late 2009 - 4GB RAM - 500 GB HDD | eBay
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Apple iMac 21.5” late 2009 model, Computers & Tech, Desktops on Carousell
Amazon.com: New 16GB 4x4GB Apple iMac (21.5 and 27-inch, Late 2009) : Electronics
iMac | 3.06 GHz Core 2 Duo | 21.5 Inch | Late 2009 - Techable.com
Apple iMac 21.5" late 2009 3.06GHz Core2Duo - some cosmetic damage - works great | eBay
iMac 21.5-inch (Late 2009) Core 2 Duo 3.06GHz - HDD 500 GB - 4GB | Back Market