Forum Discussion
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).
Wyattk As a Mac repair specialist, I frequently create a bootable installer for various macOS versions. Recently, I upgraded to an M1 MacBook Air and discovered that the "createinstallmedia" command line app no longer works for me, returning an error message stating "Killed: 9".
This limitation highlights an important consideration: you must create your installer disks on machines compatible with the operating system being installed. This issue affects not only M1 Macs like mine but also Intel-based Macs, albeit to a lesser extent. The createinstallmedia command is more widely compatible on Intel machines, but even then, it's essential to ensure that the machine is capable of running the target operating system.
In short, you can't use the official createinstallmedia command to create High Sierra bootable USB on M1 Mac. You have to download the High Sierra disk image file (.dmg) and burn it to a USB drive. This will make it as a bootable device. You can do this on any Windows PC or Mac, including the M1, M2 and M3.
