Gigabyte Z390 M Gaming build with working NVRAM

[pastrychef]

The boot process doesn't freeze.
I think it boots correctly but there is black screen at the login page. ???
Last frame before black screen attached

Hmm... Yeah... There are no errors...

So you already finished installation and you're just not able see the login screen?

 

[TchernoBob]

Hmm... Yeah... There are no errors...

So you already finished installation and you're just not able see the login screen?

Yep. the system was running fine last week with a sapphire 550 (no nvram). I sold it. So I'm now just with IGPU.
I'm not sure if I try to fix this or if I buy a GT770 that is a cheap OOB.
But fixing this could be useful for others...so let's try

 

[pastrychef]

Not sure if you guys saw this, but a cool thing to mod if you have a windows partition is the Boot Logo in your BIOS.

[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

... The data is definitely present on my main drive. The partitions for Big Sur have changed. Macintosh HD has been renamed to "Update", and all System data seems to be gone. Update does not contain an OS. I cannot see the Macintosh HD - Data partition in the Finder, but I have verified in the...

www.tonymacx86.com

I was finally able to try this out. It worked as advertised but I found the image that Inqnuam posted to be too pixelated and stretched. So I tried the "GigabyteSplashClean_800x600.bmp" posted by slider2k1 here and now my splash screen looks like:



The image doesn't take up the whole screen so it leaves black borders all around but it still looks really cool and I love it. Thanks for the heads up!

 

[pastrychef]

Yep. the system was running fine last week with a sapphire 550 (no nvram). I sold it. So I'm now just with IGPU.
I'm not sure if I try to fix this or if I buy a GT770 that is a cheap OOB.
But fixing this could be useful for others...so let's try

Please try with this EFI from a USB flash drive first.

Remember to read the READ ME file.

 

[TchernoBob]

Same black screen.
in verbose :

 

[pastrychef]

Same black screen.
in verbose :

View attachment 493776

This time, you are getting a graphics error. Make sure you have DVMT pre-alloc set to at least 64MB in BIOS.

 

[TchernoBob]

This time you are getting a graphics error. Make sure you have DVMT pre-alloc set to at least 64MB in BIOS.

it is.

 

[pastrychef]

it is.

What version of macOS are you running?

 

[TchernoBob]

What version of macOS are you running?

15.7 I think (or at least 15.6)

 

[pastrychef]

15.7 I think (or at least 15.6)

Hmm... I don't get it... The settings should be right for 10.15.6 or 10.15.7...

I don't know what else to try...