This tutorial explains how to create a bootable Windows USB in macOS without any additional tools. The instructions are absolutely foolproof, no terminal is required and the resulting USB drive can be used to install Windows on any machine and is not limited to “Boot Camp”.
Preparations
You need a USB stick with a capacity of 8 GB or more. All the data on the USB drive will be lost in the process, so make sure to save the data elsewhere before you continue.