How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
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iMac 21.5" Late 2009 (10,1) - CPU Upgrade E8600 | MacRumors Forums
apple-history.com / iMac (Late 2009)
Someone gave me this unwanted Mac, anyone know if you can upgrade the graphics cards on these ? Keep seeing conflicting information it's a 24" early 2009 imac : r/mac