Successful use of package minted requires installation of a tool called Pygments; see apps/typesetting/typesetters/external/minted pygmentize whose location depends on the method of installing Pygments.
Texifier sources the user’s SHELL profile in order to ensure that pygmentize and other tools can be found. As long as the path to pygmentize is set up in your bash or other SHELL profile properly, Texifier will be able to find it when typesetting a document that uses the minted package. You can determine this path by running which pygmentize on the command line in the Terminal app.
To explain this further, let’s assume that pygmentize is installed using Homebrew which installs its binaries in /opt/homebrew/bin and we get,
[~]$ which pygmentize /opt/homebrew/bin/pygmentize
Homebrew will set the path up for you, but if it didn’t and let’s say that we used bash as our SHELL on macOS, we would need to update our ~/.bash_profile with this line:
export PATH="/opt/homebrew/bin:$PATH"
to ensure pygmentize can be seen by other tools and command which pygmentize produces the correct path to pygmentize.