You could also install Zint directly on MacOS via homebrew (see section 2.3 of the manual). This installs the command line tool. I believe you should be able to run a GUI if needed by typing zint-qt but I’m not sure since I’m not really familiar with MacOS.
If a web app works for you, https://www.barcode-generator.org/ is based on Zint which is FOSS.
You could also install Zint directly on MacOS via homebrew (see section 2.3 of the manual). This installs the command line tool. I believe you should be able to run a GUI if needed by typing zint-qt but I’m not sure since I’m not really familiar with MacOS.