Read Instructions Carefully
MacPwn is a tool to create vanilla macOS Installer, MacPwn works flawlessly in most of the Supported PCs.
MacPwn for macOS High Sierra requires a Supported PC with UEFI BIOS.
In High Sierra Legacy Boot-loader support was removed from MacPwn.
Here is the detailed guide to Vanilla install macOS High Sierra on PC with MacPwn
Have an issue, Post it in the forum of MacPwn