UniBeast and MultiBeast users-
MultiBeast 9.2.1 is incompatible with APFS drives, but works with HFS+. We will be releasing updated versions of UniBeast and MultiBeast and a full UniBeast installation guide in the near future.
In the meantime, if you are already installed on Sierra, we suggest using the above update guides. For fresh installations, please see the following post for instructions to create a USB installer for High Sierra.
https://www.tonymacx86.com/threads/...h-sierra-public-beta-installation-usb.225520/
Good luck and be sure to let us know how it goes!