5T33Z0 128 Posted January 13 Share Posted January 13 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? Link to post Share on other sites
Hervé 2,137 Posted January 13 Share Posted January 13 Config possible corrupt. Why don't you post it? Link to post Share on other sites
5T33Z0 128 Posted February 3 Author Share Posted February 3 @Hervé Here you go. I also included the dumped DSDT if you want to have a look in it. Z490 Vision G EFI.zip Link to post Share on other sites
Hervé 2,137 Posted February 3 Share Posted February 3 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... You may use OpenCore Configurator and select iMac20,2 in the list to refill the entire set of data. miliuco 1 Link to post Share on other sites
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