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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 diskpart command to create High Sierra bootable USB on a Windows 11 or Windows 10 PC. However, you should download a copy of macOS High Sierra dmg file first.
After that, Insert the USB flash drive into your Windows 11 computer and open Command Prompt as Administrator. In the Command Prompt window, type diskpart and press Enter. This will open the Diskpart utility.
Type list disk and press Enter to display a list of all disks connected to your computer. Identify the disk number of your USB flash drive. Now, enter format fs=exfat quick and press Enter to format the partition with the exFAT file system.
Now, close the command prompt and unzip the high sierra dmg file with WinZip or 7-Zip. Finally, copy all files and folders to target USB drive. This is a simple process to make a high sierra bootable installer on Windows 11.