The Companion Guide and the README file both note that the open source packages wimlib and aria2 need to be installed. What you are seeing is either a result of those utilities not being installed, or that the directory they reside in is not part of the the $PATH variable.
If the following 2 commands both come back with "not found", you've not installed the utilities.:
which /opt/homebrew/bin/wiminfo
which /opt/local/bin/wiminfo
The Companion Guide Appendix B or C will walk you through installing them with either Homebrew or MacPorts, respectively.
If you do get a hit on one of them, then you haven't got the directory containing the commands on your shell's PATH variable.
- Paul (Technogeezer)
Editor of the Unofficial Fusion Companion Guides
