OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Mac mini Mid 2011 Memory Maxxer RAM Upgrade Kit
Apple Launching Pilot Program Allowing Repairs of Soon-to-Be Vintage Mid 2011 iMac in United States - MacRumors
Maximum memory for 2011 iMac - Ask Different
Apple iMac 27" A1419 Late 2013 All-in-One Computer Core i5 3.2gHz GT75 – Dealm4kers
Apple iMac (21.5-Inch Mid 2011) 2.5GHz Intel Core i5, 500GB HD 16GB RAM with box | eBay
A-Tech 16GB (2x8GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
Apple iMac 2011 A1311 MC309LL/A 21.5" i5-2400S 2.5GHz 16GB RAM 500GB HD HighSier | eBay
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
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro(Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com
APPLE IMAC 2011 , ALL-IN-ONE , 22″ inch , Intel Core i5 -2500S - 2.7 G – Montag Store