I just got in my Z370 hardware today and after transplanting everything I set about configuring the BIOS and testing it out.
I have two 960 Evo SSDs. One for Windows 10 and Ubuntu 16.04. The other for MacOS 10.13. All 3 OSs are UEFI.
After disabling CSM, my MacOS drive no longer appeared in the bios or boot options. After enabling CSM again the drive is back. I set CSM to “UEFI first” for storage devices but it fails to boot the drive even if I manually boot it from the boot options.
Any advice for CSM issues?
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