The Mac desktop client supports OpenVPN (UDP and TCP), L2TP, and PPTP protocols. The app lets you bookmark your favorite servers for easy access and chat with the tech support team. It also provides a way to set up one-click connect and, like NordVPN, has a kill switch in case you lose your connection. PPTP VPN Client Alternatives for Mac OS Sierra How to restore PPTP VPN Access back to Mac OS S..