On the apple menu ,located in the top-left corner of the screen click on System Preferences

l2tp macos screens guide System Preferences

And then click Network

l2tp macos screens guide Network

In Network window click on the + symbol to create a new connection.

l2tp macos screens guide plus symbol

Next in the dropdown menu select interface as default then choose VPN Type as L2TP Over IPSec then click on Create

l2tp macos screens guide dropdown menu select interface

Server Address : one of the zebravpn address (it will be found in client area)

Account Name : It's zebravpn username for Entering password and secret click on the Authentication Setting

l2tp macos screens guide Authentication Setting

Enter password and secret (secret and password will be found in client area)

l2tp macos screens Entering password Authentication Setting

Click on apply to information be saved.

l2tp macos screens saving info by apply

Then as last step click on Connect for connecting to server.

l2tp macos screens guide connecting ro VPN