Make sure there is no important data on it since it will be formatted during this process.ģ. Prepare the USB drive: Connect a USB drive with at least 16GB of storage to your Windows computer. For example, if you want to install macOS Big Sur (macOS 11), download the installer for that version.Ģ. Download the macOS Installer: Visit the Apple App Store or Apple’s website to download the macOS Installer for the version you want to install. Here’s a step-by-step guide on how to do it professionally:ġ. Making a bootable macOS USB on Windows is a process that allows you to install macOS on a Mac computer using a USB drive. How to write bootable ISO to USB macOS?.How to create bootable USB flash drive on macOS for Windows 10?.Video Tutorial:How to create macOS bootable USB using Rufus?.