Help with z77 comp

Hey all, I tried using the hackintosh.computer method to install Catalina on an old PC.

Everything goes well until I get to the point of installing the OS. Then I get an error and it reboots.

I have a pic of when it goes wrong but I’m not sure how to attach it. I’ll get that attached soon.

My specs are: CPU - i5-3550 MOBO- Asus Sabertooth mbec z77 -0131 GPU - GTX 650 RAM - 16GB

I’ve read a lot about z77s needing to be flashed to a patched bios but every link I get is outdated.

Any help would be great!

Thank you!