To create a macOS bootable installer on Windows 11/10/8/7, you'll need the following items: Step 1: Preparation before creating a macOS bootable USB on Windows 11/10/8/7 So ensure the bootable installer you want to create is compatible with your Mac model before getting started. In other words, if your Mac came with macOS Catalina, it won't boot from a macOS High Sierra bootable installer. Please note that your Mac can't boot from a USB containing a macOS version older than the one the computer shipped with. In this section, we'll give detailed instructions on how to create a macOS bootable USB on Windows. How to create a macOS bootable USB from Windows? FAQs about how to make a macOS bootable USB from Windows Start your computer with the bootable installer.Format the USB drive and restore the required dmg file to it.Clean your USB drive and convert it into GPT partition scheme if it's MBR.Prepare a USB, and download the desired macOS dmg file and TransMac.