Apple iMac 21.5-inch 2.7GHz Quad-core i5 (Late 2012) MD093LL/A | mac of all trades
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Identify your iMac – Apple Support (AU)
21.5" Late 2012 iMac | Display or GPU issue - Ask Different
New Apple iMac A1311 21.5" Glass Panel 922-9795 Front Cover EMC 2428 Mid 2011 | eBay
Apple iMac A1418 21.5" Late 2012 i5-3330S 8GB RAM 1TB Catalina Nvidia GT 640M | eBay
Configure your own 21.5-inch Apple iMac (2012) at OWC
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini RAM at Amazon.com