AudioLab

Hi Hervé and thank you very much for your quick and detailed response. Yes, I also tried to install on Catalina 10.15.3, using Chris1111's Legacy video patcher. No success. Even if SIP is disabled, it goes into an endless loop on the first boot like "SIP is disabled. Allow dump for pid 25x...." and so on. It's frustrating. I don't know if it's my motherboard that's the problem or the "knock-off" video card but it's an MSI not a Chinese manufacturer. I will try also this method and let you know. Yes I think to but I am not much experti in OC. Could you be so kindly and gently to help me to prepare a config.plist for try install Big Sur? The need it's to execute a DAW software. My specs are: gigabyte z77-d3h, 12GB DDR3 at 1600Mhz, CPU i7-2600K, MSI Geforce G210 1 Gb. Thank you so much for your kindly help.

I have tried to install this video card on Catalina 10.15.7 but with no success there are some patch to apply on the web but none works on my configuration. The strange fact is that on Mojave all works as well. There is some suggest? I have tried both clover and opencore but all end in kernel panic or infinite boot with refuse from amfi. I have disable Sip through any possible way. Please help me

Hi Jake Sorry for delay Yes sleep and wake are working but not all the Times

Yes It works. Sometimes After boot on login screen One monitor Is black but Just poweroff and on again and the Two monitors are working togheter. Thanks a lot jake you save me

It seems it works. I don't wanna sing victory....it takes 3 second when end boot but both display works. The nice thing is that if I power on one monitor it show one monitor in the monitor config panel, and in the moment I power on the other it display two monitors and two monitor are power on. I will tell you more the next days, for now I tell you thanks a lot for your precious support.

Thanks. I will try and let you know. No way. Has done boot correctly one time at next boot both screens black. The strange fact is that sometimes boot correctly showing both monitors on and more often instead screen black with backlight on and only dp monitor show mouse cursor move very dimmered but I cannot reach login Window.

Jake,please, Do you have some solution to black screen?

Update: the resolution is right due the fact that there is 1080p item and I missed. So resolution works as well. Remains the First problem

Both display are full HD so their Max resolution is 1920 * 1080. There is no adapter between the cables and monitors. They are connected One with HDMI to HDMI and other with displayport to displayport. Sometimes boot screen fails with boot display that became Black.Of course if I try i cannot connect with remote connection such anydesk, 'cause anydesk screen is black too.

A strange 2 things occured: if I turno off one monitor the other power off. It's bilateral. And the other is: if I choose personalized resolution on screen, both cannot run over 1600x900: why?

at the moment 2 monitors but if I switch from one dp to the other the works anyway so I think 3 monitors should works. attached the ioreg file 2.1 ioreg 2 monitor hdmi+dp.zip

@Jake Lo Bang! it worked! Thank you very much! I hope one day to return the favor! Thanks again Jake! @Hervé Hi I tried to follow your guide but with no luck, I probably made a mistake or I missed something. I'm a bit rusty! I was better when Clover came out. Yes, the 7040 is basically the same machine with more RAM management. At least what I remember. Anyway I love this forum. it is very well structured. Thanks for your interest. We will see soon around here

I have tried but no luck. It boots into recovery OS and usb stop working. I have made a bootable usb pendrive using gibMACOs...then copy EFI Folder inside and replace config.plist with one you linked. Changing displayport I get only blank and black screen. There is some settings I must look at?

I have made a bootable usb pen. I will let you knw if it will works. For the moment thank you very much

Ok Jake, attached under the 3 Ioreg made with version 2.1. Each with only one connected display. The strange thing is that when I connect the monitor to DP2 there is no output on the screen and connection with remote app like Anydesk, reports the monitor as integrated, Apple monitor, the system is reported by SMBIOS as IMac 17.1. Now in my efi folder there is a Config.plist file inside the archive. I hope everything is okay and can help for me. Thanks a lot. efi fiolder.zip Ioreg HDMI port.zip ioreg dp port 1.zip Ioreg dp port 2.zip