Gigabyte RX570 Partial Boot Screen

[pteeson]

Been running Mojave 14.6 for a while now. But I am curios about why I get the last part of the boot screen just before the login screen appears.

What I see is blank scdeen for a while, then get the light grey screen with the black Apple logo and the progress bar which fills in as it used to do before metal.
Then the login screen.

My question is where is that coming from? Something is driving the RX570 - what is it? boot.efi? Does that mean the kernel has been loaded?

Just very curious about it?

 

[MarkC426]

That is normal with an unflashed non-efi gpu.
Just accept it.....

 

[pteeson]

That is normal with an unflashed non-efi gpu.
Just accept it.....

Yes I know and uderstand that. I appreciate your reply.
But can you answer my questions? Even to say that you don't know.

I've been programming for 50+ years and am still curious.
Who is driving the GPU at this point? Is it the kernal? That would imply the boot process has handed off to it.

OTOH if this is still in the EFI code it's a different story.

And finally the RX570 firmware is likely signed in some way, as is Apple's EFI, so trying to shim them is not on.

Lastly OpenCore will not support my machie because it requires Westmere and mine are Nehalem.

So it's just curiosity on my part.

 

[MarkC426]

There are some threads over on the macpro section which talk about the 'techie' side of this, but it's over my head....