The slow or inconsistent internet connectivity that you are currently experiencing on your Mac might be due to slow or crowded DNS Servers used by your Internet Service Provider. You will find below the steps to change the DNS Servers on your Mac to Google or OpenDNS to fix this problem.
Change DNS Servers on Mac
In general, most Mac users do not think or worry about changing the DNS Servers on their Computer. However, it is a known fact that changing the DNS Servers on a computer to a faster DNS Server can often result in significant improvement in internet connectivity and browsing speed.
While you can switch to any DNS provider, Google and OpenDNS are two of the most popular and free DNS providers that you can make use of. Both these DNS providers are highly reliable and are likely to be much faster than the DNS Servers used by your Internet Service Provider.
While Google provides a fast and dependable DNS service, OpenDNS provides additional features like content filtering, anti-phishing and child protection controls.
Change DNS Servers on Mac to Google or OpenDNS
Follow the steps below to change the DNS servers on your Mac.
1. Click on the Apple Logo from the top menu-bar on your Mac and then click on the System Preferences… option in the drop-down menu.
2. On the System Preferences screen, tap on the Network option.
3. On the Network Screen, click on the Lock Icon located at the bottom left corner of the screen.
4. Enter your Admin Account User Name and Password when prompted.
5. While you are still on the Network Screen, first make sure that you are on the WiFi Tab in the Left Sidebar Menu and then click on the Advanced option (See image below).
6. On the WiFi Network screen, first click on the DNS tab in the top menu and then click on the + Plus button located in the bottom left corner of the Window.
7. Enter 184.108.40.206 and 220.127.116.11 to change the DNS Servers to Google on your Mac and click on OK to save these settings (See image above).
Note: In case you want to use OpenDNS, enter 18.104.22.168 and 22.214.171.124
While you can enter as many DNS Servers as you want, macOS prioritizes connection to DNS servers based on the order in which they appear. This means that your Mac will end up using the first DNS address most of the times, in case it is able connect to the first one successfully.
After changing the DNS servers, you should see an improvement in the speed of browsing on your Mac, in case the problem of slow internet connectivity on your Mac is related to the slow DNS used by your Internet Service Provider.