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Apple iMac A1418 21.5" Desktop - MD093LL/A (November, 2012) for sale online | eBay
Apple replacing some 2011-2012 iMac graphics cards - CNET
2011 iMac Graphics Card Upgrade | MacRumors Forums
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Apple iMac review (2012) | Engadget
Apple iMac 21.5" - Late 2012 Reviews, Pros and Cons | TechSpot
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