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Big Sur 11.1 says "this version of Mac OS X is not supported on this Platform" although i am using iMac20,2…


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Since I upgraded Big Sur from 11.0.1 to 11.1, macOS won't boot unless I use -no_compat_check Boot-Arg and I don't know why. I am using OpenCore 0.6.5

 

The config works great in Catalina with iMac20,2, since I use an i9 10850K.

For Big Sur I adjusted the csr-active-config Value to FF0F0000 and that's about it.

 

I don't know what that issue should be, but I can't be the SMBIOS since we all know for a fact that 2020 iMacs are supported by Big Sur :D

 

Any idea what might cause this issue?

  • 3 weeks later...

SMBIOS info is empty; that's probably why. You need to follow up the guidance at Dortania and ensure you do not skip any step...

Empty_SMBIOS.jpg

 

You may use OpenCore Configurator and select iMac20,2 in the list to refill the entire set of data.

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