In our project when we were trying to install openvpn on Mac we got into the this issue.
Opening utun (connect(AF_SYS_CONTROL)): Operation not permitted openvpn Mac
Openvpn is the tool that allows us to connect to a remote server using VPN. After installing the openvpn on mac we tried to run the following command to connect to VPN.
$ openvpn client.ovpn
This issue happened because it needs administrative privileges to run openvpn command.
We had to run the command using as a sudoer user.
$ sudo openvpn client.ovpn