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Black Screen with MacPro 6,1 or iMac 15 or iMac 17 System Definition

Joined
Sep 21, 2018
Messages
7
Motherboard
ASUS TUF B360-Plus Gaming
CPU
i5-8400
Graphics
GTX 1060
Mac
  1. MacBook Pro
I have an Asus Prime Z370-A with i7-8700K and Nvidia GT 1030 2GB
I have 2 Full HD monitors connected to the Nvidia.
System Definition is 18,3.
Quick Synch enabled (ig-platform-id 59120003). All works very well BUT one thing:
- On boot when BOTH monitor are switched on and connected to the NVidia the PC goes into a BLACK SCREEN after Apple Logo and the boot doesn't complete.
I must disconnect the second monitor prior to booting to have a proper boot. THEN, after boot I can connect the 2nd screen and it works.
How to solve this so I don't have to disconnect the monitor prior to booting?
Nvidia has a DVI + HDMI ports.

Thanks.
I have exactly the same problem. I tried switching the displays (mac's "main" one to the main port of my gc) but this doesn't work. Would be grateful for any hints to solve this.
 
Joined
Sep 22, 2016
Messages
464
Motherboard
Gigabyte Z170X-UD5 TH-Clover
CPU
i7-6700K
Graphics
Vega 56
Mac
  1. Mac mini
Mobile Phone
  1. iOS
Joined
Dec 31, 2013
Messages
796
Motherboard
Huawei Matebook D
CPU
i5-8250U
Graphics
UHD 620
Mobile Phone
  1. iOS
I have exactly the same problem. I tried switching the displays (mac's "main" one to the main port of my gc) but this doesn't work. Would be grateful for any hints to solve this.
Enabling CMS in bios solved the issue.
 
Joined
Sep 21, 2018
Messages
7
Motherboard
ASUS TUF B360-Plus Gaming
CPU
i5-8400
Graphics
GTX 1060
Mac
  1. MacBook Pro
Last edited:
Joined
Aug 14, 2016
Messages
7
Motherboard
Lenovo 20BSCTO1WW
CPU
i5-5300U
Graphics
Intel HD5500
Was working on this issue for a few days while updating my desktop (High Sierra, GTX 950). Booting with two monitors connected (one DP, one DVI) caused a black screen and hang. Booting with the DVI cable disconnected works fine, and after booting I could re-connect the DVI to get the second monitor working, though it would black screen/hang again if the computer went into sleep and turned off the displays.

Also, it seemed that WhateverGreen.kext was not successfully loading, and I could not find it via IORegistryExplorer.

Re-enabling CSM support in my BIOS is what ultimately fixed it for me (The desktop guides I read all suggested disabling this during installation). After re-enabling it, I can boot with dual displays, and WhateverGreen is showing up in IORegistryExplorer.
 
Joined
Sep 20, 2016
Messages
33
Motherboard
Gigabyte H-170
CPU
i5-6500
Graphics
RX 580
Mac
  1. MacBook Pro
  2. Mac mini
Mobile Phone
  1. Android
Just came across this topic while searching for the fix to a black screen.

When starting up Clover displays on two screens, but once it gets to the login screen the second "turns off". System Preferences displays two monitors as being available & when screen sharing the second one shows up. Im using both HDMI ports on my MOBO.

The AGDPfix doesn't seem to be making a difference for me, I've ticked "kext-dev-mode=1" in Clover
 
Joined
Sep 20, 2016
Messages
33
Motherboard
Gigabyte H-170
CPU
i5-6500
Graphics
RX 580
Mac
  1. MacBook Pro
  2. Mac mini
Mobile Phone
  1. Android
@eseanq have you resolved it? I have the same problem. Which version do you run?
Nope. Still only have the one monitor working. Haven't had much time to mess around with it. As far as the version, are you referring to OSX? If so then I'm running 10.14.2.
 
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