Passenger preferences icon Using Passenger preferences

You can use Phusion Passenger to run Ruby on Rails and Rack applications on the Apache web server included with Mac OS X.

Preference Explanation
Address The address to use for viewing the application in a web browser, e.g. “myapp.local”.
Aliases Alternative addresses for the application, e.g. “admin.myapp.local”.
Folder The folder containing the application files.
Run in… The environment you want to run the application in.

You can drag an item from the source list onto a text editor or into the terminal to further customize the Apache configuration.