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How to Create macOS High Sierra Bootable USB for Reinstall
Wyattk If you don't like the command line appoach, then there is a simple and direct way to create a High Sierra bootable USB on a PC. You just need to download High Sierra bootable dmg and burn the dmg file to USB drive. That is all of it. This is the easiest way to make a bootable macOS USB on any PC or Mac without restrictions.
P.S. I am following this useful guide and managed to create three bootable USB for macOS High Sierra, Catalina and El Capitan (less than 10 mins).
WyattkYou can use the free virtualbx app to make a macOS virtual machine on Windows 11 or Windows 10 PC. After that, boot into VM and use the official createinstallmedia command to create High Sierra bootable USB on PC.
To create a macOS virtual machine on a PC with VirtualBox, first, download and install VirtualBox along with the Extension Pack. Download a macOS ISO image, and open VirtualBox to create a new virtual machine, selecting "Mac OS X" as the type and the corresponding version. Allocate at least 4GB of RAM and 30GB of disk space, configure the virtual machine settings to use 2 CPUs, enable "EFI" under "System," and attach the macOS ISO to the virtual CD drive. Apply necessary EFI firmware settings using command line instructions specific to macOS. Start the virtual machine, and follow the installation prompts to install macOS on the virtual hard disk.
After that, copy and paste this command to make bootable USB from Install macOS High Sierra app:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
