Remove Public from URL

I definitely was going to do this but after checking online, I saw others do it a different way.

However, I want to be sure I do it in the correct CI way.

The "different way" is probably because they do not have access to the server configuration. That would be normal on a shared server from a service provider.

But you are using a MAMP setup and can define the server root to be any path you want. That path should be the CodeIgniter public directory.

Note that, as far a CodeIgniter is concerned, the directory does not need to be named "public". If you're MAMP setup insists on some particular name (e.g. "htdocs" or "public_html") that is ok. As long as your domain is set to serve out of that directory.