1. Getting a reference to the main bundle using Cocoa.

To get the main bundle in Cocoa application, call the mainBundle class method of the NSBundle class.

2. Getting a reference to the main bundle using Core Foundation.

> Use the ***CFBundleGetMainBundle*** function to retrieve the main bundle for your C-based application.

> ```
   CFBundleRef mainBundle;
   // Get the main bundle for the app
   mainBundle = CFBundleGetMainBundle();