In your inc/config.php are you using 'localhost' or '127.0.0.1'? I know it says you can't find any pages using either, but simply changing the url in your browser to check won't change the settings internally -- they're not quite the same thing, afterall. I don't understand all the ways MAMP differs from WAMP, nor do I understand Macs at all. But you might want to try setting up what's called 'Virtual Hosts' rather than using MAMP out of the box. Basically, it'll definitely make it so you can host more than one site, and in changing these settings, it might help things route correctly??
Here's a tutorial. Don't forget to make changes in Mysidia's inc/config.php file to reflect the psuedo-url you make for your site.