My computer is a Mac OS X El Capitan V10.11.6 and I can't get Modeller to run in terminal. I installed Modeller with the package from their website and inputted my license key. I also installed Python 3.8.2 and confirmed its installation in terminal. Typing "mod9.24" is supposed to run Modeller, but the output says "usage: mod9.24 script [...]." I've just recently learned basic terminal commands and have no experience working with Python. Video tutorials with Modeller use Windows, so I would appreciate any help from someone with Mac OS X knowledge! Thank you!
If you've installed it for Mac OS X, it should show up in the Applications folder. You can hit Cmd + Space to bring up Spotlight and search for "Modeller". That will open the GUI application. The command line is not what you're after, I think.