X299 Big Sur Support

[Bagi1992]

Maybe I found a workaround, but needs some more test.
On my Asus X299-A Prime, disabling Serial Port in Bios -> Advanced -> Onboard Devices seems to fix the problem.
I rebooted 7 times yesterday and 3 times this morning. During night I unplug from the power outlet.
As for now I haven't got any black screen, usually I got a couple every 3-4 good reboot.e

Long story:
I read that others with the same issue have fixed by disabling Serial Port in bios. For what I remember on Catalina amend Mojave I had the Serial Port disabled but before upgrading to BigSur I decided to upgrade also the Bios and decide to leave Serial Port on since I thought it did not give any problem.

My first boot with this bios settings was okay! I will feedback you later!

 

[salvatore.polito]

My first boot with this bios settings was okay! I will feedback you later!

Great

Also, after WatchOS 7.1 I'm able to unlock this Mac with my watch. In the end was a watch problem..

 

[oli.mathieu]

Hello
I'm having Hard time to install Big SurI can boot the USB installer

1. installer reboot (before finish?), "12 min remaining".
2. I can boot the installer on SSD
3. After the verbose the Apple and progress bar appear
4. Back to verbose for a proper shutdown .... not a kernel panic

I can't go through the second step of "Reminder Big Sur installation process #65"
How Can I get some informations about the issue since it happens after the verbose ?

What I use :

1. opencore 0.6.3
2. Big Sur 11.0.1
3. en-US language in the config.plist

I tried to get EFI folder as minimal as possible

@Loloflatsix
I tried your Asrock folder without success. So may be it's due to wrong UEFI settings.. could you share your Asrock X299 Legend UEFI settings ?

Any advice would be appreciated

 

[Loloflatsix]

Hello
I'm having Hard time to install Big SurI can boot the USB installer

1. installer reboot (before finish?), "12 min remaining".
2. I can boot the installer on SSD
3. After the verbose the Apple and progress bar appear
4. Back to verbose for a proper shutdown .... not a kernel panic

I can't go through the second step of "Reminder Big Sur installation process #65"
How Can I get some informations about the issue since it happens after the verbose ?

What I use :

1. opencore 0.6.3
2. Big Sur 11.0.1
3. en-US language in the config.plist

I tried to get EFI folder as minimal as possible

@Loloflatsix
I tried your Asrock folder without success. So may be it's due to wrong UEFI settings.. could you share your Asrock X299 Legend UEFI settings ?

Any advice would be appreciated

I share my bios settings :



(12 screen captures attached)

 

[oli.mathieu]

I share my bios settings :

View attachment 494851

thanks
I can confirm the I'm stuck in the loop of the "second step" ... but no kernel panic
EDIT
I tried with your BIOS setting without success (reseting NVRAM each time).
Thanks again

 

[Loloflatsix]

A few days ago we had Release Candidate 1

 

[Loloflatsix]

macOS Big Sur installation steps :

Reminder post #1 & post #2

1.1 / If you have a previous public beta installed launch directly install macOS Big Sur - Open Core 0.6.3 is required



1.2 / if you have not Big Sur installed, Boot the USB stick with install macOS Big Sur Open Core 0.6.3 is required, after you reach the installer , format your disk as "Big Sur"

2/ Select the disk "Big Sur"

3.1 / Wait during the installation process until your computer restart





3.2 / First reboot : IMPORTANT : at gui boot screen select Macintosh HD (not Big Sur) : the installation process will continue in verbose mode mode during about 4 or 5 minutes (lots of verbose pages ...)




3.3 / Second reboot : at gui boot screen select Big Sur : installation process will continue with Apple Logo about 2 or 3 minutes the progress bar will be short



3.4 / Third reboot : at gui boot screen select Big Sur : the installation first ends in verbose mode and after the log screen will appear: you are done

( Not tested on X299 build yet with USB installer only in my old H87 build but it must also work for our system)

 

[Loloflatsix]

Today after the event Apple macOS Big Sur came out :




So after months of trying beta versions the time, it's time now to install macOS Big Sur

macOS Big Sur 11.0.1 (20B28) Release Candidate 2

,

macOS Big Sur 11.0.1 (20B29)

Good luck, enjoy

 

[P1LGRIM]

Today after the event Apple macOS Big Sur came out

It is not the final release - It is Release Candidate 2 :

 

[Loloflatsix]

It is not the final release - It is Release Candidate 2 :

View attachment 495096

15 November : macOS Big Sur 11.0.1 (20B29)