Big artifact instead of install screen (B550, RX590)

[rushpracticesalmon]

Hi!

This is my first go at Open Core. And... I have some issues.

So. Here is my setup :

• B550 Aorus PROX AX motherboard
• Ryzen 3700X CPU
• RX590 (Saphire) GPU

I get to boot to the USB storage. I get all of the verbose without any issue.
But the MacOS installer GUI won't diaply properly. I have my cursor. If I shake it I can force load some parts of the screen but... there is something wrong.

Currently my boot arg is "-v debug=0x100 keepsyms=1 npci=0x200 alcid=1"

I've added "npci=0x200" even though I've enable "above 4g decoding in the BIOS" as it seems to have fixed it for someone here.

 

[Shaneee]

Check for any BIOS updated for your board. I had this with a version of AGESA. Updated past it and it started working.

 

[rushpracticesalmon]

Thanks Shanneee. I flashed my BIOS from F2 to F10 (latest) and so far so good. MacOS is installing.
I had my mouse not working at first, but I just plugged it on another port and it worked.