How to Protect Online Privacy on a Mac: Settings & Apps

Your Mac shares more information than it appears to. Apps you approved years ago often still have those permissions, and a café Wi-Fi network can see more of your traffic than most people expect. The good news is that macOS already includes solid privacy controls. You just need to know where they are and when an extra tool is actually worth installing.

This guide focuses on macOS 27 Golden Gate on Apple silicon Macs. Most of the advice also applies to macOS 26 Tahoe and macOS 15 Sequoia, though a few labels and menu locations differ slightly.

TL;DR

Review app permissions, turn on FileVault and the firewall, keep macOS updated, and tighten Safari’s tracking protections. A content blocker helps inside the browser; DNS filtering and an outbound network monitor give you broader control. A VPN is useful on untrusted networks, but it does not make you anonymous. Start with the built-in settings and only add tools when they solve a real problem.

Settings: protect your privacy with macOS built-in tools

Start here. You do not need another utility before checking what your Mac is already sharing.

Audit App Permissions

Open System Settings > Privacy & Security and go through each category. Pay particular attention to the more powerful ones:

• Input Monitoring – can observe keyboard and mouse input
• Accessibility – gives broad control over the system
• Screen & System Audio Recording – allows screen or audio capture
• Full Disk Access – exposes a wide range of files

Turn off anything you do not recognize or no longer use. Also review Analytics & Improvements and Apple Advertising if you never intentionally opted in.

Full Disk Access deserves extra caution. It largely bypasses normal privacy protections and is increasingly requested by AI agents and other tools that want deep system access. Apple has said it plans stricter controls because of these risks. Only grant it when an app genuinely needs it (for example, a backup utility), and revisit the list periodically.

In practice, most of us accumulate a long list of forgotten permissions. A quick scan every few months is usually enough. You do not need to revoke everything — just make sure each permission still has a clear purpose.

Turn On FileVault

On Apple silicon Macs the internal storage is already encrypted. Enabling FileVault adds password protection to the encryption keys, which helps if the Mac is lost or stolen.

• Go to Privacy & Security > FileVault and click Turn On.
• Choose Create a recovery key if you prefer not to rely on your Apple Account.
• Store that recovery key offline.

We still recommend creating and keeping the recovery key somewhere safe. Losing both your password and the key is an expensive way to learn the lesson. FileVault protects data at rest; it is not a substitute for a strong login password or good backup habits.

Enable the Firewall and Stealth Mode

The macOS firewall is switched off by default. Turn it on under System Settings > Network > Firewall, then open Options and enable Stealth Mode. This makes your Mac less responsive to unsolicited network probes.

For most people, firewall + Stealth Mode is a sensible baseline. More restrictive options exist, but they can interfere with legitimate services such as file sharing.

One important distinction: the built-in firewall mainly handles incoming connections. It does not show you what apps are sending out. For that you will need a different tool (covered later).

Keep macOS and Security Responses Updated

Go to System Settings > General > Software Update, click the information button next to Automatic Updates, and make sure macOS updates and security responses are enabled. Also check Privacy & Security > Background Security Improvements and turn on automatic installation if available.

These smaller patches matter. Attackers regularly exploit known vulnerabilities, and installing the updates promptly is one of the highest-leverage things you can do. We would prioritize automatic security updates over adding another security app. A well-maintained Mac is a better starting point than a crowded menu bar.

Tune Safari’s Privacy Settings

Safari’s built-in protections are stronger than many people realize once they are properly configured:

• In Safari > Settings > Privacy, leave Prevent cross-site tracking on.
• Set Hide IP address to “from Trackers” (or “Trackers and Websites” if you use iCloud Private Relay).
• On the Advanced tab, set Advanced Tracking & Fingerprinting Protection to “in all browsing”.

Private Browsing is useful when you do not want local history saved, but it does not make you anonymous. Websites and services you sign into can still identify you.

Our recommendation is to start with these built-in controls before adding extensions. They are easy to overlook and provide a solid baseline without trusting another developer.

Swap Passwords for Passkeys Where Possible

Stolen credentials remain one of the most common ways accounts get compromised. Reducing that risk is straightforward:

• Open the Passwords app.
• Review any entries flagged as reused or compromised.
• Replace them with passkeys wherever a site offers the option.

Passkeys are now mainstream. The FIDO Alliance’s 2026 report estimated around 5 billion passkeys in use, with 75% of surveyed consumers having enabled at least one. Because a passkey is tied to the real website, a convincing phishing page cannot use it. Some accounts still allow password fallbacks, so the old risks have not disappeared entirely.

Apps that cover what macOS doesn’t

The built-in settings get you most of the way. A few third-party tools close the remaining gaps.

Tracker Blocker and DNS Filter

Safari’s protections limit cross-site tracking, but they do not remove every ad or tracking script. Ad blockers such as AdGuard, 1Blocker, Wipr, or uBlock Origin Lite give you more control inside Safari. By design, Safari’s rule-based content blockers do not see which pages you visit.

Content blockers only work in Safari. For broader, system-wide filtering, a DNS service such as NextDNS or AdGuard DNS is more useful. Both can be set up with a configuration profile or a small app in a couple of minutes. Coverage is not perfect — some apps use their own networking methods — but it catches a large amount of tracking that browser extensions miss. Check how your VPN handles DNS, because some VPNs will override a separately configured filter.

A Cross-Platform Password Manager

Apple’s Passwords app works well if you stay inside the Apple ecosystem. If you also use Windows or Android, a manager such as 1Password or NordPass makes syncing logins and passkeys across devices much easier and will flag breached credentials.

A VPN With a Kill Switch

A VPN encrypts traffic between your Mac and the VPN server. Look for an audited no-logs policy and a reliable kill switch. ExpressVPN‘s Mac app includes an Internet Kill Switch that is enabled by default and can be managed under Profile > Internet Kill Switch.

A kill switch is the feature we care about most on a Mac. It is the difference between “the VPN dropped” and “the VPN dropped and my traffic stayed private.”

Outbound Network Monitors

The built-in firewall only filters incoming connections. To see and control what apps are sending out, use LuLu (free and open source) or Little Snitch (paid). Both alert you when an application tries to make an outgoing connection and let you allow or block it. On macOS 27, use Little Snitch 6.5 or later if you choose the paid option.

Protect your privacy on different networks

Your Mac’s privacy settings matter wherever you connect, but the risks and useful precautions differ between a trusted home network, public Wi-Fi, and a phone hotspot.

Home Wi-Fi

Secure the router first: use WPA3 (or WPA2/WPA3 mixed mode), change the default admin password, and keep the firmware updated. On your Mac, open System Settings > Wi-Fi > Details for your home network and turn on Limit IP Address Tracking.

Public Hotspots

Treat public Wi-Fi with caution. A simple set of habits goes a long way:

• Set Private Wi-Fi Address to Rotating.
• Switch AirDrop to Contacts Only.
• Connect the VPN immediately after logging into the captive portal.
• Choose Forget This Network when you leave.

Our practical rule is straightforward: use the network carefully, keep sharing services off when you do not need them, and never install anything just because a hotspot login page suggests it.

iPhone Personal Hotspot and Mobile Connections

An iPhone hotspot is usually preferable to unknown café Wi-Fi, especially over USB. Use a strong password and turn the hotspot off when you are finished. Your carrier can still see that your phone is connected and how much data is used. A VPN on the Mac encrypts the traffic beyond that point. Mobile proxies are a more specialized option and are rarely necessary for everyday privacy.

Privacy habits worth keeping

• Revisit app permissions after every major macOS update.
• Delete accounts you no longer use instead of just logging out.
• Use Hide My Email (and iCloud+ aliases) when you do not want to give your real address.
• Keep Personal Hotspot switched off when you are not using it.
• If you are at higher risk of targeted attacks, consider Lockdown Mode under Privacy & Security. It hardens the system significantly but also breaks some everyday features, so most people do not need it.

A more private Mac without making it hard to use

Protecting your privacy does not mean installing every security app or turning off every permission. Start with the basics: review app access, enable FileVault and the firewall, keep macOS updated, strengthen your accounts, and turn on Safari’s tracking protections.

Then add a content blocker if you want fewer ads and trackers in the browser. DNS filtering and an outbound network monitor are logical next steps if you want broader visibility and control. A VPN belongs in the setup when you have a specific reason to use one — usually untrusted networks.

If we were setting up a Mac from scratch tomorrow, that is the order we would follow. The goal is not perfect anonymity. It is to share less by default, understand which companies and apps you actually trust, and make deliberate choices when software asks for access.

Loved the article, share!