X299 Big Sur Support

[izo1]

ASUS SAGE/10G 3302 BIOS with Apple Logo Splash Screen
Released 01/15/2021

Notes from Asus

• Fix crash free function

New Sage 10G bios after the new one below. That was unexpected.

ASUS SAGE/10G 3301 BIOS with Apple Logo Splash Screen
Released 01/12/2021

Notes from Asus

• Improve system performance
• Fix SSD device compatibility

Note: With ASUS BIOS, you can save your BIOS profile on a USB Stick through the BIOS as a .CMO file and then use Bios Flashback, then restore the settings from the .CMO. One thing I noticed is sometimes with this the Above 4G doesn't get enabled so be careful as upon reboot after restoring settings you will get a black screen, and also COM Ports are never restored properly (I always have it disabled on this board). I will try to post a guide for this soon, so it makes it easier for everyone if it's interesting let me know. It's pretty easy.

 

[egroys]

ASUS SAGE/10G 3302 BIOS with Apple Logo Splash Screen
Released 01/15/2021

Notes from Asus

• Fix crash free function

New Sage 10G bios after the new one below. That was unexpected.

Would you be willing to do the Prime Deluxe Bios, please?
I LOVE the way you made the apple logo and really don't want to see the Asus search for incredible (lol) screen when I update.

Thank you in advance!

 

[izo1]

Would you be willing to do the Prime Deluxe Bios, please?
I LOVE the way you made the apple logo and really don't want to see the Asus search for incredible (lol) screen when I update.

Thank you in advance!

Sure thing, here you go.

I could never figure out how to remove the "Press F2..." message since it seems like it's a string hidden in all the AMI bioses, or else it would be a perfect boot screen

There are instructions here how to do this. It should work with Gigabyte or other brands of X299 boards, but I haven't personally tried, only did this to ASUS boards so far.

 

[tucoboy]

Hey everyone, just updated to the "newest" 11.2 Beta (20D5042d) today and after restarting it a couple of times, everything works still, no problems at all. The only major issue is Kensington TrackballWorks app doesn't work at all. Looks like I might have to purchase SteerMouse (for $20), if Kensington doesn't come out with a finalized update. But that won't come until Apple releases their full 11.2 version.

 

[jyavenard]

A bit puzzled, as after going away for 3 weeks (summer holidays here), booting again today and I find that I get no USB working at all (so no keyboard nor mouse). This happens with either BigSur or Catalina.

It boots fine, but once booted, I can no longer log in.

Any ideas what could be wrong with my system? was working just fine before

Edit: Found it it was DisableIoMapper.

 

[jyavenard]

I did some optimisation after updating to OpenCore 0.6.5.

Big Sur (11.1) working EFI for ASRock X299E-ITX/ac with i7-7820X, Vega 56 and Apple WiFi card in the WiFi card slot on the board.

Notes:
- Platforminfo is anonymised and has to be filled with your own values
- HideAuxiliary is enabled
- simple Bootpicker with indefinite timeout
- the SMC kexts for temps and stuff are included but disabled
- TSCAdjustReset.kext has to be adjusted to the cores used on your cpu

Does nvram works with your ASRock x299?

 

[kubusikan]

Does nvram works with your ASRock x299?

Sadly, no.
I am not sure, but i think it worked in clover?

 

[jaspercat5]

I don't really know what prevents it from showing the power draw accurately on your system but it worked for me correctly since a couple of years on X299.
For now i am using OpenCore 0.6.4 without any of the mentioned sensor kexts and Inter Power Gadget reports the data as shown in my screenshot. It did so too in clover without any sensor kexts loaded.
I am using the iMac Pro system definition, if that makes any difference?

View attachment 504916

Interesting. I am getting Power to report on IPG but the scale seems to be wrong - unless I am mistaken I would have expected the power draw to be north of 200Watts under load on the X299 ...for example my Z390 (i7 - 8 core) draws about 180W on a benchmark test like CB. My SMBios is iMacPro1,1.

 

[jyavenard]

Sadly, no.
I am not sure, but i think it worked in clover?

Yeah, it definitely used to work with earlier version of macos with clover

And ever since I updated clover that use bits of OC it no longer works there either.

 

[Ludacrisvp]

PRELIMINARY METHOD FOR INSTALLING BIG SUR ON SYSTEM WITH BROKEN NVRAM
<<trimmed steps from post>>
But first we need to see if it works

This worked out great on my install of 11.1, granted this was not a X299 system but a SuperMicro X8DT6 dual X5680 xeon board, basically a non-EFI Mac Pro from 2010. Booting via OpenCore 0.6.5 Legacy (for BIOS only systems). So this should be a viable candidate for a quirk of some kind of the OC devs are interested in adding this for systems with no / broken NVRAM.