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Plan to use my old 2010 iMac 27” as an external monitor and connect it with my windows’s desktop PC. However, have a hard time finding the video cable in the market. My PC has HDMI/DVI/DISPLAY ports on video card, and there is only mini display/thunderbolt port on iMac 27”, there are lots of mini Display port to HDMI/DVI/DISPLAY in the market, but not on the opposite way, anyone knows any option how to setup this? Thanks, Tom