grab the connection bang out whose DNS configs you want to change in the left pane and click theAdvancedbutton.
Only one connection pop in is usually activetypically Wi-Fias indicated by the green dot next to its name.
Click theDNStab to display two panes.

Lifewire
One of the panes contains the DNS Servers, and the other contains Search Domains.
This is the screen where you could add or delete DNS entries.
you might override the assignments by editing the DNS server list on your Mac.

Entries in dark text indicate the DNS addresses that were entered locally on your Mac.
An empty entry signifies that no DNS servers have yet been assigned.
Any entries that you add replace the grayed-out entries.

The order of the DNS servers is important.
When your Mac needs to resolve a URL, it queries the first DNS entry on the list.
If there is no response, your Mac asks the second entry on the list for the necessary information.

smack the+(plus sign) in the bottom left corner of the screen.
An example is 208.67.222.222, which is one of theDNS serversavailable from Open DNS.
Do not enter more than one DNS address per line.

To add more DNS addresses, repeat the process.
Highlight the DNS address you want to remove.
poke the-(minus sign) in the bottom left corner of the screen.

Repeat for each additional DNS address you want to remove.
you’re able to’t delete DNS addresses configured by another unit (a grayed-out entry).
If you addedexample.comto the Search Domain pane, then Safari can appendexample.comto any single hostname entered.

Search Domains are added, removed, and organized using the same method as DNS entries.
Finishing Up
When you finish making edits, click theOKbutton.
This action closes the Advanced online grid sheet and returns you to the main online grid Preference pane.

Click theApplybutton to complete the DNS editing process.
Your new DNS configs are ready to be used.
Remember, the options you changed only affect your Mac.
Test your new DNS providerto check that everything is set up correctly.