Should copying EFI from USB to SSD always work?

[svantevid]

So my problem is, after installing Catalina (with EFI from Mojave copied to USB EFI, which is the thing that finally allowed me to finish installation without black screen), I ran Multibeast, installed kexts and setup config. But trying to boot from SSD results in black screen. I tried numerous things so far, ben at it for days now.

Booting from USB works great, Metal support, both HDMI work etc...
I tried copying that EFI form USB to SSD... but the problem persists
I also tried just copying some things from USB, like kexts I didn't install and drivers, but no luck.

Shouldn't the EFI that works on USB also work on SSD, or am I missing something?

 

[Feartech]

So my problem is, after installing Catalina (with EFI from Mojave copied to USB EFI, which is the thing that finally allowed me to finish installation without black screen), I ran Multibeast, installed kexts and setup config. But trying to boot from SSD results in black screen. I tried numerous things so far, ben at it for days now.

Booting from USB works great, Metal support, both HDMI work etc...
I tried copying that EFI form USB to SSD... but the problem persists
I also tried just copying some things from USB, like kexts I didn't install and drivers, but no luck.

Shouldn't the EFI that works on USB also work on SSD, or am I missing something?

try deleting the EFI folder from the hard drive EFI partition

then copy EFI folder from USB EFI partition to hard drive EFI partition

 

[svantevid]

try deleting the EFI folder from the hard drive EFI partition

then copy EFI folder from USB EFI partition to hard drive EFI partition

Thanks, I did try that multiple times, emptying the bin just in case