Good news: your Mac comes with strong, built-in security. You mostly just need to leave it on and keep up with updates. Here is how to stay safe.
Keep these turned on
- Automatic updates — Apple quietly patches security holes. Turn them on under System Settings → General → Software Update.
- Gatekeeper — macOS blocks apps from unknown sources by default. Install apps only from the App Store or developers you trust; if your Mac warns you about an app, that warning is there for a reason.
- FileVault — encrypts your disk so your files are safe if the Mac is lost or stolen. Turn it on under System Settings → Privacy & Security → FileVault.
- Firewall — turn it on under System Settings → Network → Firewall.
Everyday safe habits
- Do not click links or open attachments you were not expecting.
- Ignore pop-ups claiming your Mac is infected or that you must call a number — those are scams, not real Apple messages.
- Use a strong, different password for important accounts (a password manager makes this easy).
Think something is wrong?
Macs get malware far less often than PCs, but it happens. If your Mac is behaving strangely or showing pop-ups, call me before installing any “cleaner” app — most of those are the problem, not the fix.