Initiate iOS Update at the start of class and let the update run with lids UP during the fire drill:
1. Launch Self Service from the Dock or the Desktop.
2. Enter your credentials to logon.
3. Click on Install OS X Update on the main page. If you do not see the update as an option, then your machine is already up to date.
* Your Mac device will automatically reboot after the update completes. Do not shut the lid during this process until you see the log in screen.