Sapphire RX 580 Pulse user here.
Had the same black screen issue, added new WEG 1.3.4 in the Clover EFI drive and updated to Clover 5097
Links:
https://github.com/Dids/clover-builder/releases/tag/v2.5k_r5097
https://www.tonymacx86.com/resources/whatevergreen.440/
I also have the same hardware. i7-6700, 580 Pulse 8GB, Z170k Motherboard. Just upgraded to Catalina.
https://github.com/29satnam/Skylake-RX580-Hackintosh
Kinda same happening with my HD7750. Output is working just fine with HDMI, DVI connected display is detected but black screen, I'm on 10.13.6 currently and already ordered one Display Port cable off amazon.
I'm not able to get the second monitor to work with HD530 Desktop on Mojave.
Graphics acceleration is fine. Tried all 3 patching methods.
HDMI output is working, but not the DVI one.
Hey, I'm sorry I didn't get any notification for your reply.
I uploaded my EFI drive here. I hope this help, if you are still stuck.
And for Mojave I'm waiting for NVIDIA to release the web drivers.
SOLVED!
I also had this issue.
FYI: This happens when your system's got corrupted prelinkedkernel file.
This is how you fix it:
1. I booted to the installer terminal, then there are two commands.
rm -rf /Volumes/CorruptMacDrive/System/Library/PrelinkedKernels/prelinkedkernel
then
touch...
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