You might try this approach. tonymacx86 had some success with that card.Can any one help me to make nivadia GeForce 9400 gt work on catalina
I tested on my Gigabyte P55M-UD2 - Core i5-750 - NVIDIA 9400 GT (built in 2009!!) Had to boot with NVIDIA Inject = True.
I'm interested to know how to do the Catalina install on an older 2008/9 real Mac when using the older SMBIOS that is not eligible for Catalina. Did you use a newer Mac or hackintosh to install Catalina to your laptop's HDD ?works on Late 2008 Mac Book Pro