This is the procedure for installing anyenv on Mac. I encountered a few issues, so here are my notes.
Installation
In my environment, I have various things placed in /usr/local/bin/, so I will install anyenv there.
cd /usr/local/bin
git clone https://github.com/riywo/anyenv
Setting the Path
export PATH="/usr/local/bin/anyenv/bin:$PATH"
export ANYENV_ROOT=/usr/local/bin/anyenv
eval "$(anyenv init -)"
It seems that anyenv is designed to be installed directly under the root directory, so if you don't specify ANYENV_ROOT to a specific directory, the anyenv command won't execute correctly. Also, if you forget to write eval "$(anyenv init -)", you may encounter issues where the commands of the installed packages cannot be executed, so be sure not to forget this.
Conclusion
The installation is now complete. You should be able to use various anyenv commands.