Mac users interested in Unibeast 5.0 generally download:
UniBeast is a simple application that allows you to create a bootable USB drive from any Mac App Store purchased copy of OS X. This all-in-one bootable USB drive can also be used as a rescue boot drive for system recovery. This app has an intuitive interface.
macOS High Sierra Patcher application is intended for those with unsupported Macs and Hackintosh users, but any Mac user can use the app to be able to download the complete installer file from Apple servers.
Note: Make sure SIP is disabled on the system you intend to install High Sierra on. If it's not or you're unsure, just boot into your Recovery partition.