Accessing node.js running on local computer

I'm running a node.js server on a Mac and want to share the URL with someone else.

When I access my public IP on the correct port, this doesn't work.

Is there another way to set it up to make it publicly accessible?'

Thanks!

Try <Your Mac's IP>:<node server's Port> on a different computer locally. You could also use <Your external IP>:<node server's Port> but you'll be needing to port forward the port in your router.