There are several ways to update your Mac OS X software and operating system.

VCSU assigned MacBooks should be enrolled on Jamf to keep computers managed and updated.  

Jamf is a cloud based service that Technology Services uses to help manage and provide applications to VCSU users on their Mac OS X and iOS devices.

To setup Jamf please see the following article:   Self Enrolling on Jamf server and using VCSU Self Service

For additional information, please visit:   How to Update Software on Your Mac