macOS Security Best Practices: 12 Ways to Keep Your Mac Safe
Macs are secure by design, but most real-world compromises come down to settings left off and habits left unchecked. This guide walks through 12 practical steps — from FileVault and prompt updates to two-factor authentication, Lockdown Mode, and safe browsing — to harden your Mac without slowing it down.
Table of Contents
1. Install Security Updates Promptly
The single most important habit. Apple regularly patches actively exploited flaws — installing within a few days of release closes the window attackers rely on.
- Open System Settings → General → Software Update.
- Click the (i) next to Automatic Updates and enable Install Security Responses and system files.
- Keep automatic updates on so Rapid Security Responses apply quickly.
Tip
Follow our security update coverage and the Update Tracker to know when important patches ship.
2. Turn On FileVault
FileVault encrypts your entire disk, so your data is unreadable if your Mac is lost or stolen. On Apple Silicon it's essentially free in terms of performance.
- Go to System Settings → Privacy & Security → FileVault.
- Click Turn On.
- Choose how to recover your account (iCloud or a local recovery key — store the key somewhere safe).
3. Strong Passwords & Two-Factor Authentication
- Use a unique, strong password for your Mac account and Apple Account.
- Turn on two-factor authentication for your Apple Account (System Settings → your name → Sign-In & Security).
- Use the built-in Passwords app (or a trusted password manager) to generate and store unique passwords, and enable passkeys where sites support them.
Don't Reuse Passwords
Password reuse is the most common way accounts get taken over. A breach on one site shouldn't unlock the rest of your life.
4. Gatekeeper & App Sources
Gatekeeper blocks unsigned, untrusted apps. Keep it set sensibly:
- Go to System Settings → Privacy & Security.
- Under "Allow applications from," keep it on App Store or App Store & identified developers.
- Only override the warning for an app you genuinely trust and obtained from its official source.
5. Enable the Firewall
The firewall blocks unsolicited incoming connections — useful on public and shared networks.
- Go to System Settings → Network → Firewall.
- Turn it On.
- Optionally enable Stealth Mode so your Mac doesn't respond to probes.
6–12. More Essential Steps
Lock Your Screen Automatically
In Lock Screen settings, require a password immediately (or after a short delay) when the screen sleeps. Use Touch ID where available.
Review App Permissions
In Privacy & Security, audit which apps have access to your camera, microphone, screen recording, location, and full disk. Revoke anything that doesn't need it.
Back Up with Time Machine
Regular, ideally offline backups are your best defense against ransomware and hardware failure. Keep at least one backup disconnected when not in use.
Be Phishing-Aware
Apple never asks for your password by email or message. Don't click unexpected links, verify sender addresses, and navigate to sites directly rather than via links in messages.
Use a Standard Account for Daily Use
Create a separate admin account and use a standard account day-to-day. Malware run by a standard user can do far less damage.
Secure Your Network
Use a strong Wi-Fi password (WPA3 where possible), and on public Wi-Fi prefer a trusted VPN. Enable iCloud Private Relay in Safari for added privacy.
Enable Find My & Activation Lock
Turn on Find My Mac so you can locate, lock, or erase a lost device remotely. Activation Lock deters theft by making a stolen Mac far harder to reuse.
Lockdown Mode for High-Risk Users
If you may be targeted by sophisticated, well-funded attacks (journalists, activists, executives), Lockdown Mode sharply reduces your attack surface by limiting certain web technologies, message attachments, and connections.
- Go to System Settings → Privacy & Security → Lockdown Mode.
- Turn it on and restart.
Lockdown Mode is intentionally restrictive and unnecessary for most people. Enable it only if you face elevated risk.
Frequently Asked Questions
macOS includes built-in protections (Gatekeeper, XProtect, and malware removal). For most users these plus good habits are enough. Reputable third-party tools can add value in higher-risk or business environments, but avoid aggressive "cleaner" apps.
On Apple Silicon (and modern Intel Macs with the T2 chip), encryption is hardware-accelerated, so the performance impact is negligible. There's no good reason to leave it off.
Within a few days for normal updates, and immediately for updates Apple flags as fixing actively exploited vulnerabilities. See our security coverage for which is which.
Conclusion
Good Mac security is mostly about a handful of settings and steady habits: update promptly, encrypt with FileVault, use unique passwords with two-factor, keep Gatekeeper and the firewall on, back up, and stay alert to phishing. Set these once and your Mac is dramatically harder to compromise. Start by making sure you're on the latest release — see How to Update macOS.