RX 570 output Displayport to iMac 27 2009 as monitor (TDM)
I`m trying to use my iMac 27 2009 as a monitor (Target Display Mode) for my PC with a RX 570 but seems my PC, with Windows 10 64bits, doesn`t detect the iMac as a monitor. When I presse cmd+F2 on iMac the screen goes black. The most problems that I found on internet is that the iMac neighter goes to the black screen. I assume that it`s all fine in the iMac side. I updated my iMac to another Mac OS X version. Now 10.13.6 I bought 2 different Diplayports -> mini Displayport different cables.
Has any way to force the output video? Maybe the resolution that the videocard tries to send it`s wrong.