hello MaLdOn,
i have this config:
MB intel DG41RQ with last bios
CPU intel Xeon E5450. 4x3ghz
2 x 2gb DDR2 800mhz
Radeon HD6670 1gb DDR5
I installed high sierra and upgraded to 17G10021 without having put the HD6670 card.
the problem comes when i want to install the HD 6670 card, the pc hangs no way to pass.
if I start a new installation with the HD6670, it blocks directly.
I tried a DSDT that you made on the forum for another person, but that did not change anything.
my config,plist : smbios imac 10.2 or imac 14.2 no change
can you help me for this problem ? best regard Phil