Weird BIOS issues

J

josh.harshbarger93

New member
AMD OS X Member
May 12, 2020
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Hey everyone! I have my boot USB all correctly configured finally, but when I change my BIOS settings (particularly disabling CSM), I lose both my SSD and my NVME SSD. So when I boot into the Mac installer, I have nothing to install to. I'm only able to regain access to my drives when I re-enable CSM. Running most current BIOS on ASRock X570 Extreme 4. Any ideas??
 
Disabling CSM gets rid of legacy (non GUID) partitioned drives. When you boot into the installer, go to Disk Utility first and format your drive as GUID. Exit Disk Utility and continue with the install.
 
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