I'm not on a Mac but I think I can help.
The key to remember with defining the server path is that it has to be the "web root" and not just a folder on your hard drive. This is the special folder that your local web server uses to process the file as a web page.
This is the same folder that you used to get your welcome page. You need to create a folder for you web pages in the same root folder. When you type localhost in your web browser, it will take you to your local web root.
So if you copy your site into the new folder called classyjewelers, you would access it on your testing server with your browser by typing:
http://localhost/classyjewelers/
You only need one “Add to Cart” button. Dynamic web pages pull information from the database. You create one results page that displays the product and the “Add to Cart” button. You use repeating regions to display multiple items on the same page. This eliminates the need to have a separate page for every item in your database.
You might find this guide helpful:
E-commerce - Getting Started Guide
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