You can install it on a hard drive that already has Windows installed: By default, the macOS installer will not work with hard drives that were initially formatted in Windows.You can set up everything from a Windows / Linux computer. You do not need a real Mac: All other methods of Installing Sierra require extensive knowledge + a Real mac because those guides are based on macs, but Sierra Installer never require a mac, you can setup a Hackintosh without the need of a real mac.
