increasing USB ports on iMac late 2012? | MacRumors Forums
Is a mini display port and a thunderbolt port the same thing? - Quora
Will the display of a mid-2010 iMac 27' work when placed in a mid-2011 iMac 27'? - Quora
Apple iMac review (mid 2011) - The Verge
Amazon.com: Mini DisplayPort to HDMI Adapter for iMac Mid 2011(27-inch, 21.5 inches) Mini DP to HDMI Adapter Compatible with MacBook Air/Pro, Microsoft Surface Pro/Dock, Projector and More 1-Pack : Electronics
Apple publishes Thunderbolt support documents - 9to5Mac