Install Metanorma via Homebrew
Homebrew is a popular package manager on macOS.
You will need to first install Homebrew; just run the one-line installation command given on Homebrew's landing page.
Then, run the following commands in Terminal.app:
brew install metanorma/metanorma/metanorma
For more information about
metanorma CLI see the Usage page of Metanorma CLI