I had the same issue what you can do is get the hacking tool and fix it up real quick does your card have 3 DP and 1 HDMI you kind of have to set the ports in the hacking tool and then it should work fine search hacking tool and 580 should see a lot of post on it
I just put a RX580 in and both of my monitors stay black I have a 3 DPs 1 HDMI and a old school HDMI both boot fine but after Apple load and before the login screen the both go black I have figure how to boot so i can make some changes...... windows works fine as usual
Yeah I went through the list then hit the NVidia site and saw they didn't give a dam about updating the drives and bit the bullet and I found a pretty decent Radeon 580 so that should take care of it ....... I will definately drop back in and let everyone know how the swap went
I upgraded to Catalina from HS my GTX 1050 TI only displays one monitor .... any way to get two monitors up seems like I'm going to have to get a Radeon since i run Windows and MAC on the same Rig. I could live if I could get both displays working
I been running my Hacks to Boot Win and Mac for a minute now PC-side for gaming and Hack for music and Film editing but also have been a Macbook guy I'm excited about the new chips. hopefully Apple goes off the Chart with the new machines ..... But come on we always win
the install went smoothly, had an issue with MB 6.4.1 installing so I found that the FAKESCM.kext was causing an issue. onlything I needed to work was the audio. removed that extension and MB installed but it killed my installation and it will not boot, in Single user / Safe mode / or any...
*(WIP)Light's Recording Station #1 GA-Z77X-UP5-TH / i7 3770K / 32 GB / 256 SSD / GT 640
everything seems to be working pretty good right now. I will play with the MiniMac Defs sometime this week. I need to read up on what I need to do to get everything to work right off the bat.