NOTE: Your company may have alternate specific guidance for how you should configure auto-updates - please check with your IT and compliance teams.
Open System Preferences, then click on Software Update
Check Automatically keep my Mac up to date
4. Check ALL of the boxes in the Advanced panel
On Ubuntu Linux:
Use the following guide to set up automatic updates: https://help.ubuntu.com/community/AutomaticSecurityUpdates
Use the following guides to set up automatic updates, depending on your Windows version: