Step 1 
From the Apple menu select System Preferences.

 

Step 2 
Choose the Internet & Wireless icon. Then click on the Network 

 

Step 3 
Under the AirPort option, check Remember networks this computer has joined. Click on OK.

 

Step 4 
Under the Proxies option, check Automatic Proxy Configuration under 'Select a protocol to configure:

 

Step 5 
Enter http://au.edu/proxy.pac in the "Automatic Proxy Configuration" field. Click on OK.

 

Step 6 
Press the Apply button and then test it using Internet.

 

Step 7 
Visit library website at www.library.au.edu Searching from Electronic Resources. 
(The pop up must be allowed) 
Enter your "User Name" and "Password" field. 
Click OK to proceed.