USB 3 + Wifi ac + BT4.2 for iMac 27" mid 2010 | MacRumors Forums
USB 3.0 for iMac mid 2011 | MacRumors Forums
職場のiMacを一気にパワーアップしてやった。: RS2000
4-Port USB 3.0 Hub For iMac - Sabrent
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