High Sierra to Mojave lose DP

[Guest Andrew Montreal]

Hi all,

 

I am new to all of this.

 

Mac Pro 5,1 3.33 Hexa 2010

MSI RX 580

High Sierra

Display Port works beautifully.

 

Mojave

No more signal on Display Port

And The computer thinks the 4k monitor is 1080p… at least that is the resolution it chooses when I select the non-scaled option (native monitor? Something like that.)

 

Any thoughts?

 

Andrew

 

Source: MacRumors