1. Install Xcode
You can download from the Application store on your Mac. Simply search for Xcode.
This would take some time as it is a big file, so be patient.
2. Install XQuartz
You can download from the following link or simply google for the installation file.
3. Terminal Steps
Here you need to key in some commands in your terminal.
4. Create and edit .octaverc file
4a. Ensure you are in your home directory.
Issue this command in your terminal.
4b. Create and edit .octaverc file
5. Edit bash or zsh file
Restart your computer!
That is all, you should be done! If you have any issues, you can drop a comment below.