10 Essential Security Rules for Your MacBook Air

1. Keep your passwords private Never share your passwords or passphrases with anyone.

2. Lock your Mac when stepping away Always lock your screen (press Control + Command + Q) or log out when you step away from your MacBook, even for a moment.

3. Keep macOS updated Install Apple system and app updates as soon as they are available to ensure you have the latest security patches.

4. Only download trusted software Only install apps from the official Apple App Store or verified, trusted developers. Avoid downloading unknown software or files from untrusted websites.

5. Be cautious with attachments Never open unexpected attachments in emails or messages, even if they seem to come from someone you know. Verify the file with the sender first.

6. Avoid suspicious links Do not click hyperlinks in emails or messages from unknown sources. Manually type web addresses into your browser instead.

7. Back up your files regularly Save your important work to your approved cloud storage or company-designated backup system so you do not lose data if your Mac is damaged or lost.

8. Do not alter security settings Leave all built-in Mac security features and company-installed security software active. Do not attempt to disable them.

9. Log out of lab computers Always shut down or log out of shared laboratory Macs as soon as you are finished using them.

10. Know what to do if you suspect a virus If your MacBook behaves strangely and you suspect malware, immediately:

    • Turn off the computer.

    • Turn off Wi-Fi.

    • Report it to Mr. Watson at cwatson1@irsc.edu. (Note: Per IRSC policy, all infected computers will be wiped and re-imaged).