This tutorial demonstrates how to configure Apple Mail on Macintosh for @colorado.edu Gmail accounts.
You may need to enable IMAP for your account prior to configuration of your email client (https://mail.google.com). To do this:
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.