This tutorial demonstrates how to configure Apple Mail on versions of Mac OS X 10.9 and newer for @colorado.edu Gmail accounts.
Before configuring Apple Mail, you may need to enable IMAP in Gmail (if you've already done this, skip to step 3). To do this, log into the Gmail web client, and from the cog menu select Settings.
Your account will now be configured and mail will begin to sync.
Some users may need to change their app security settings when using non-google/android email programs. While signed into your Gmail account in a browser, open the Google Apps menu, then select My Account.
*Note: You should try to connect your account without changing these settings and change only if the previous steps don't work.