Differences Between Late 2013 iMacs (Tapered Aluminum): EveryMac.com
GALATI, ROMANIA, FEBRUARY 26, 2014: New IMac 27 With OS X Mavericks. It Brings New Apps To Desktop. OS X Is The Operating System That Powers Every Mac. New Apple IMac 27
Aluminum 2012-2020 iMac Display, VESA Mount Details: EveryMac.com