If your VPN is connected but websites, streaming services, or your network still reveal your location, a DNS leak may be the reason.
This guide explains how to fix DNS leak with VPN on Mac and shows the exact settings to check for better privacy.
What a DNS Leak Means on macOS
Domain Name System, or DNS, translates human-readable website names into IP addresses.
When a VPN is working correctly, DNS requests should usually travel through the VPN tunnel instead of your internet service provider’s resolver.
A DNS leak happens when macOS or an app sends DNS queries outside the VPN tunnel.
That can expose your browsing activity, local network information, or ISP details even though your visible IP address appears protected.
Why DNS Leaks Happen on a Mac
Macs use network priority rules, system DNS settings, and sometimes app-specific behavior that can bypass a VPN.
Common causes include misconfigured VPN clients, leftover DNS servers from a previous connection, split tunneling, unstable Wi-Fi, and custom network profiles.
- VPN app is not set to force DNS through the tunnel
- macOS still prefers a manual DNS server configured on the network interface
- Split tunneling sends some traffic outside the VPN
- IPv6 traffic is not fully handled by the VPN
- Security software or a firewall is overriding network behavior
How to Fix DNS Leak with VPN on Mac
Use the steps below in order.
Start with the simplest checks, then move into macOS network settings if the leak continues.
1. Confirm the VPN is actually connected
Open your VPN app and verify that the status shows an active connection.
Then check whether the server location matches the endpoint you selected.
Some apps reconnect after sleep but briefly fall back to the local network, which can trigger a leak.
If the app includes a built-in IP or DNS leak test, run it before making changes.
This gives you a baseline for comparison after each fix.
2. Enable the VPN’s DNS protection or leak protection feature
Many premium VPN services include DNS leak protection, private DNS, or a “use VPN DNS” option.
Turn it on in the app settings.
If your provider offers an always-on mode or kill switch, enable that too so traffic stops if the tunnel drops.
Look for features such as:
- DNS leak protection
- Kill switch
- Always-on VPN
- Block connections without VPN
- Use VPN DNS servers
3. Remove custom DNS servers from your Mac
macOS may still use manually added DNS servers even when a VPN is active.
To check, open System Settings, then go to Network, select your active connection, choose Details, and open the DNS tab.
If you see custom DNS entries such as Google Public DNS, Cloudflare, OpenDNS, or a router address you do not need, remove them.
Leave the field empty or let the VPN app manage DNS if the provider recommends that approach.
4. Renew the DHCP lease
A stale network lease can keep old DNS information active.
In the same network settings panel, renew the DHCP lease for your Wi-Fi or Ethernet connection.
This forces macOS to request fresh network parameters from the router.
After renewing, disconnect and reconnect the VPN, then test again.
5. Flush the macOS DNS cache
macOS can cache DNS records temporarily.
Clearing the cache helps ensure you are testing current DNS behavior rather than old entries.
On modern versions of macOS, open Terminal and run the following command:
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponderEnter your administrator password when prompted.
Then reconnect to the VPN and repeat your DNS leak test.
6. Disable split tunneling if privacy is the priority
Split tunneling is useful when you want certain apps to bypass the VPN, but it can also expose DNS traffic.
If your goal is maximum privacy, turn split tunneling off entirely or exclude only trusted apps that do not handle sensitive browsing data.
After disabling it, restart the VPN app so the new routing policy takes effect.
7. Address IPv6 leakage
Some VPNs handle IPv4 well but do not fully route IPv6 traffic.
If a DNS leak test shows IPv6 resolvers outside the tunnel, either enable IPv6 support in the VPN app or disable IPv6 on the Mac’s network interface if your provider recommends that approach.
Not all VPNs support IPv6 equally, so check your provider’s documentation before making system-wide changes.
8. Update or reinstall the VPN app
Outdated VPN clients can contain routing bugs or compatibility issues with newer macOS versions.
Update the app from the provider’s official site or App Store.
If the problem persists, uninstall the app completely, restart the Mac, and install the latest version again.
This often resolves conflicts with stale configuration files or deprecated network extensions.
9. Check for conflicting network tools
Firewalls, packet filters, antivirus apps, proxy tools, and ad blockers can interfere with DNS routing.
Temporarily disable third-party security software and test the VPN again.
If the leak disappears, re-enable the tools one by one to identify the conflict.
Also inspect any browser-level proxy settings, since some browsers can use separate network configurations from the rest of the system.
How to Test for a DNS Leak on Mac
After each fix, verify the result with an independent test.
A reliable DNS leak test should show only the VPN provider’s DNS servers or the resolver specified by the VPN service.
Use multiple checks for better confidence:
- Run your VPN app’s built-in leak test
- Visit a DNS leak test website while connected to the VPN
- Compare the listed DNS servers with your ISP and VPN provider
If the test displays your ISP, local router, or your real region, the leak is not fixed yet.
Revisit the DNS settings, then reconnect the VPN and test again.
Best Practices to Prevent DNS Leaks on macOS
Prevention is easier than troubleshooting after every connection change.
Use a VPN provider with a strong privacy policy, modern encryption, and explicit DNS leak protection.
Avoid manually assigning DNS servers unless you understand the routing impact.
- Choose a VPN with audited privacy practices
- Keep macOS and the VPN app updated
- Use the kill switch when available
- Avoid unnecessary split tunneling
- Test again after switching networks
If you travel often or use public Wi-Fi, recheck your DNS behavior whenever you join a new hotspot or office network.
Routers and captive portals can apply their own DNS rules before the VPN fully reconnects.
When the Leak Persists After All Fixes
If you still cannot fix DNS leak with VPN on Mac, the issue may be provider-side rather than local.
Some VPNs route traffic correctly but rely on DNS infrastructure that is not fully isolated from the public network.
At that point, contact the VPN provider and ask whether their macOS client supports DNS leak protection, IPv6 handling, and system-wide tunneling on your version of macOS.
A reputable provider should be able to tell you exactly how its DNS requests are handled.
In stubborn cases, switching to a VPN with better macOS support is the fastest long-term solution.
Look for consistent DNS leak test results, clear documentation, and support for the latest Apple networking changes.