What error message are you seeing?

what d I do after this step python3.12 -m pip install -r requirements-gui.txt
how can I get the gui?, I don see any other cmds in the readme like in windows readme.

im here at the moment

The iw3 commands are documented in the iw3/README.md.

GUI
Run iw3.gui module from the root directory of nunif.
python -m iw3.gui

ranjeetsingh@My-Gold-Macbook nunif % cd nunif
ranjeetsingh@My-Gold-Macbook nunif % python -m iw3.gui
zsh: command not found: python
ranjeetsingh@My-Gold-Macbook nunif % python3 -m iw3.gui
/opt/homebrew/opt/python@3.14/bin/python3.14: Error while finding module specification for 'iw3.gui' (ModuleNotFoundError: No module named 'iw3')
ranjeetsingh@My-Gold-Macbook nunif % python -m iw3.gui
zsh: command not found: python
ranjeetsingh@My-Gold-Macbook nunif %

Im getting this :(

If you are following INSTALL-macos.md, use python3.12 command.

Install Python 3.12.
(If you are using a venv, you can just use python command)

For Python and venv environments, please search online or ask an AI, as this is common knowledge.
I generally consider macOS users to be UNIX users, so I assume they will configure the command line environment as they prefer.