How to create a bootable USB Drive that will boot on BOTH an Intel Mac and a PC
In my Mac's Startup Security Utility, I had selecte &quot;Allow booting from external media&quot;, but not &quot;No Security&quot; from the section above called &quot;Secure Boot&quot;. Once I had selected &quot;No Security&quot; as well, I was able to boot from by thumb drive (FAT32).