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APPLE IMAC 21.5in CORE I5 2.5GHZ MID-2011 8GB 500GB SMART DVD MAC OS SIERRA (Renewed) : Amazon.co.uk: Computers & Accessories
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Mac OS CATALINA on a 2011 IMAC. I kept hearing it won't work because of the video card and would make my Mac unable to use but it is working for me.
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