Hi every one.
I finally manage to install Big Sur on this machine.
View attachment 502875
It took a lot of time.
The help of tonymacx86 @
jin.artemis which gave me his EFI folder and @dragonsun252 from Win-Raid Forum which provided me with an nvram patched bios for my motherboard X99-a.
(WARNING- DANGEROUS STUFF AHEAD)
(USE AT YOUR OWN RISK)
Anyway for those of you willing to risk bricking your bios, I'm also attaching my X99-a Patched bios provided by dragonsun252,
@jin-artemis EFI folder and a version of the patcher which can patch the bios automaticly but the resulting .CAP need to be manually edited and controlled by very experienced users. If you lack this knowledge please check the Win-Raid Forum (USE AT YOUR OWN RISK)
The installation failed a lot of times until I repeated the process from scratch formating the target drive as MACOS Extended (Journaled)
The installation was a mess and I feel the need of repeating the whole process again before being able to help anyone else.
I know this is not the right place for this argument since is not Catalina related, so...
https://www.tonymacx86.com/threads/asus-x99-boards-big-sur-not-compatible.303335/
see you there people
Happy holidays.