Here is the information you need:
Linux 64-bit: Full versions and no-GUI versions (for command-line use without graphical libraries). macOS: Maintained by the community on GitHub. Documentation: multiwfn 3.8 download
Windows (PowerShell):
Note: This paper is accurate as of the 3.8 release. Always check http://sobereva.com/multiwfn for the latest version and updates. Here is the information you need: Linux 64-bit