Whether you are dual-booting your Mac or formatting a new PC, the best way to get Windows 10 is through a fresh installation, not an upgrade. But you'll need to create a bootable Windows 10 USB drive first. The process is a little more complicated if you're using a Mac.

Microsoft offers a simple tool to create a bootable USB on Windows, but there is no such tool for Mac users. The process can be easy or relatively complicated depending on which type of Mac you have. We'll explain the differences below.