Adding USB3.0 to late 2009 iMac (11,1) | MacRumors Forums
Amazon.com: USB C to Mini DisplayPort Cable(Not Thunderbolt 2), QCEs Unidirectional Thunderbolt 3 to Mini DisplayPort Cable 4K 6.6Ft Compatible with Type C MacBook Pro/Air/iMac/Mac Mini/Surface to Mini DP Monitor : Electronics