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memory - What can be replaced/upgraded in a late-2009 iMac to make it run like a 2014-2016 iMac? - Ask Different
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iMac 2009 / 2010 / 2011 GPU upgrade — Fixing LED/LCD PWM brightness with an ESP32 | by Fixing Things | Medium
iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
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
iMac | 3.33 GHz Core 2 Duo | 27 Inch | Late 2009 - Techable.com
iMac Late 2009 21.5" GPU upgrade - Apple Community
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5 Things to Know Before Upgrading Your 2009 or Later iMac
How I kept my iMac running for a decade | Cult of Mac
iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
Upgrading an iMac GPU for METAL Support! Late 2009 – Mid 2011 Models - YouTube