iMac 21.5" Late 2009 (EMC 2308) iMac 21.5" Mid 2010 (EMC 2389) iMac 21.5" Mid 2011 (EMC 2428) iMac 21.5" Late 2012 (EMC 2544) iMac 21.5" Early 2013 (EMC 2545 Edu) iMac 21.5" Late 2013 (EMC 2638) iMac 21.5" Late 2013 (EMC 2742) iMac 21.5" Mid 2014 (EMC 2805) iMac 21.5" Late 2015 (EMC 2889) iMac 21.5" Late 2015, 4k Display (EMC 2833) iMac 21.5" Mid 2017 (EMC 3068 or 3069)
