I can't install catalina on my device. because my device only supports legacy bios. I have tried installing High Sierra 10.13.3 and 10.13.6 and it didn't work at all. I get a message the CPU is not supported and CPH is not supported. I wish I could feel that macOS is running well even if it's not perfect on my device. thanks. I beg for the masters to help me. sorry for my messed up english.