I bought a new 2017 iMac 27", but I still want to use my 4K monitor. I was using the monitor with my 2012 MacBook Pro just plugging in the mini-DP cable into a Thunderbolt 2 port.
I tried the "All Smart Life" USB Type C to Mini DP adaptor, which advertised that it worked on the new MacBook Pro, but it didn't work on my iMac.
Does anyone know what adapter I can use to connect my new iMac to my 4K monitor?