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Apple said that would run happily on a late 2009 or later MacBook or iMac, or a 2010 or later MacBook Air, MacBook Pro, Mac mini or Mac Pro. Open the Catalina Patcher app. I have an iMac late-2009 running Catalina 10.15.7 with 2.8Ghz Quad-Core i7, 16GB RAM, 1TB SSD and ATI Radeon HD 4850 512mb and it upgrades to Big Sur fine and no issues with slow/sluggish video just no working Wi-Fi or Ethernet so basically bricked.
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Work with such hardware as Mac Pro, iMac and MacBook Pro computers released in early 2008, Aluminum Unibody MacBooks or MacBooks Air manufactured in late 2008, or white MacBooks and Mac Minis produced in early 2009. MacOS Catalina Patcher 1.4.4 for Mac is available as a free download on our software library. This free software for Mac OS X is. If you want to install MacOS Big Sur, the Guide is here; UPDATED Catalina GUIDE IS HERE; https://www.youtub.
Imac 2009 Catalina Patcher Software
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Can A 2009 Imac Run Catalina
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