Please do the following:
- From the Apple menu, click System Preferences, then click Network.
- If the lock icon in the lower left-hand corner of the window is locked, click the icon to make changes, and when prompted to authenticate, enter your password.
- Select the connection for which you want to configure Google Public DNS. For example:
- To change the settings for an Ethernet connection, select Built-In Ethernet, and click Advanced.
- To change the settings for a wireless connection, select Airport, and click Advanced.
- Select the DNS tab.
- Click + to replace any listed addresses with, or add, the Google IP addresses at the top of the list:
- For IPv4: 18.104.22.168 and/or 22.214.171.124.
- Click Apply and OK
- Then connect to VPN