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General Discussions

Journeyman III

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.

1 Reply

The old Mac machines need special cards to work with the way its designed.

Shoving a new card in it may work with an external monitor.