Therefore, if your computer’s hard drive already has Windows installed on it, you will not be able to install macOS on there, but High Sierra Installer automatically patches this so you can bypass this limitation. You can set up everything from a Windows / Linux computer.

You do not need a real Mac: All other methods of Installing High Sierra require extensive knowledge + a Real mac because those guides are based on macs, but High Sierra Installer never require a mac, you can setup a Hackintosh without the need of a real mac.