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X299 Big Sur Support

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Can you take a screen shot when you reboot at OpenCore gui screen ?

Sure - attached :)

Some notes:
  • This is with 3 SSD drives, Catalina, Windows and a drive for Big Sur install.
  • I have tried with only empty drive for Big Sur install but it made no difference
  • This is booted from the Big Sur installer USB
  • On first boot there is no "MacOS Installer" volume, on reboot after the installer hits 12 minutes that appears and is what I selected to continue as there wasn't a "Preboot" volume - that's where we have the reboot loop
:thumbup:
 

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Finally managed to get Big Sur installed :). I now need to do some fine tuning and I guess I need to start with the SSDTs to get certain things working. I have 32 GB RAM Installed but the "Memory Overview" pane suggests my configuration is incorrect - any ideas how I can fix this to report correctly?
 

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Sure - attached :)

Some notes:
  • This is with 3 SSD drives, Catalina, Windows and a drive for Big Sur install.
  • I have tried with only empty drive for Big Sur install but it made no difference
  • This is booted from the Big Sur installer USB
  • On first boot there is no "MacOS Installer" volume, on reboot after the installer hits 12 minutes that appears and is what I selected to continue as there wasn't a "Preboot" volume - that's where we have the reboot loop
:thumbup:
Ok :

Disconnect Windows disk, reboot on Catalina, format your Big Sur install disk, reboot on USB installer , when you come at macOS gui screen , choose disk utility, format another time your Big Sur Install disk (APFS) name it Big Sur and restart the installation , take a screen shot each time you boot the installer and at the end of verbose process.
( I will come back at end of afternoon)
 
Asus X299 Prime Deluxe - i9-7980XE - XFX Radeon VII 16GB - Asus ThunderbolyEX 3 worked.

During the installation or update, There was twice it will hang will a cursor hanging on top left side of the screen, I had to switch off the computer manually and boot into the installer disk. I have tried a few time, every time same behaviour. but the third time will boot into Big Sur.

My EFI is base on what @Loloflatsix has shared. I update tp OC 6.3 and it worked. Asus Hyper M.2 X16 seems to have some issue though.

I have to let you guys know that I had some problem after the installation.... The SSD for some reason showing an unreasonably high disk storage occupancy, like 630GB. And when I use the "manage storage" in finder, it will end up with a crash.

So, I go back to my Catalina in Clover, clone a ssd with CCC with safetynet Off. The resulted Catalina, ended up with using only about 250GB of disk space.

I then took out all other ssd,HDD and booted up with the single Clone only and upgrade with Big Sur, it still will hang once with a tab at upper right corner, but only once. Now "manage storage" works smoothly. I'm still testing it.... putting back all the SSD/HDD back to see what will happened......

For all of you who are still trying to update to Big Sur, you may have to leave only the os system disk in the computer....
 
I have 32 GB RAM Installed but the "Memory Overview" pane suggests my configuration is incorrect - any ideas how I can fix this to report correctly?
You're using MacPro 7,1 SMBIOS, right? That's a standard problem with that SMBIOS.

In Catalina it could be fixed with a special kext, MacProMemoryNotificationDisabler.kext.

But unfortunately this kext currently no longer works in Big Sur, because some of Big Sur's changes broke a certain method of injection used by Lilu.

Last week I tried an alternative method to fix this - using OpenCore's CustomMemory setup to specifically define all of my RAM chips. This works in the sense that the configuration you specify does show up in About This Mac -> Memory. But no matter what I tried, I could not get rid of that error and its notification.

So currently the only solution I know of is to use the iMacPro 1,1 SMBIOS instead, which I think a lot of users in this thread are already using? Personally I would prefer to use MacPro 7,1 as I feel it fits my hardware better (Cascade Lake X), however given this annoying memory notification, maybe I too will move to iMacPro 1,1.

It's possible that in time the developers of Lilu will find another way to run these patches on Big Sur, which could make MacProMemoryNotificationDisabler.kext work again. But I don't know if that's likely or not.
 
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This one can’t load on your ACPI, I think :

Scope (_SB.PC00.LPC0)
{
Device (RTC0) ——> Device (RTC)
{
Name (_HID, EisaId ("PNP0B00")) // _HID: Hardware ID

;)
I can't boot Catalina with Device (RTC) instead of Device (RTC0)
EDIT
FYI : I can't boot without this SSDT-RTC0 (I ve just tried to be sure)
 
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@oli.mathieu
@rustEswan
Actually I can't determine if your problem is the result of SSDTs or other points in your setup : as i read you can load the installer, start the installation and the problem persists on reboot when the process stops ?

If there were problems with ACPI or Kexts, you would not be able to start the installer.

I see on screen shots problem reported to SIGKILL : Diskarbitration which send a SIGKILL ? Or GPU ?

Changing SMBIOS for exemple : I was unable to install the first beta with iMacPro SMBIOS on AMD X570, on X299 I only used iMacPro SMBIOS and it works well. Now with OC 0.6.4 the issue is gone on AMD X570...

Maybe your macOS Big Sur install app…so perhaps download the installer another time.
Here what happen
I boot on the USB installer
I format the SSD (APFS)
I launch the installation on the formatted SSD
A reboot take place around "12 min remaining" - Not a good sign isn't it ?
I boot on "MacOS Installer" from Opencore GUI
The progress bar get bigger and bigger
The display resolution change
2 seconds after it reboots - it's an infinite loop

Hope this help you to Help me :crazy:
 
Here what happen
I boot on the USB installer
I format the SSD (APFS)
I launch the installation on the formatted SSD
A reboot take place around "12 min remaining" - Not a good sign isn't it ?
I boot on "MacOS Installer" from Opencore GUI
The progress bar get bigger and bigger
The display resolution change
2 seconds after it reboots - it's an infinite loop

Hope this help you to Help me :crazy:
Don’t know if that can help you : you tried with and without vsmcgen=1 on bootarg ? I see some people keep it.
 
Don’t know if that can help you : you tried with and without vsmcgen=1 on bootarg ? I see some people keep it.
I have tried with vsmcgen=1 as well but didn't help either.

Just got home so going to try the process you suggested and capture the screens at reboot etc - will post back shortly. :thumbup:
 
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