之前好像都是要一个第三方开源app，官方推荐的那种。不过今天去openvpn官方看，有个macOS专用的，和iOS手机端长的一毛一样

OpenVPN Connect v3

This is the official program that we recommend and support for OpenVPN Access Server and OpenVPN Cloud. This new OpenVPN Connect v3 client software offers client connectivity across 4 major platforms. On Windows, macOS, Android, and iOS, we now have a new client interface with new functionality.

Please note that we recommend that you download the OpenVPN Connect Client through your OpenVPN Access Server, as it will then come prepared with the correct settings to make a connection to your Access Server. You can download it by going to the client web interface of your OpenVPN Access Server and logging in as a valid user. You will then be offered the option of downloading the OpenVPN Connect v3 client for macOS. It is also possible to obtain a copy of a completely blank installer for OpenVPN Connect software below, but this installer will not contain any connection settings so you will have to take additional steps after installation to configure your OpenVPN Connect software to make a connection to your Access Server. If you are installing the file below on a computer that already has OpenVPN Connect v3 installed and configured, it will simply update it to the new version while retaining all settings.

• OpenVPN Connect v3 for macOS
  sha256sum: 00a3b10c29c13336e52eae6f6dd3960058e9c77e463eaf0742378a31ad0485d4
  
• Official release notes (change log)

OpenVPN Connect v2

This is the previous generation of OpenVPN Connect client software for OpenVPN Access Server. It is still supported but we recommend people to use OpenVPN Connect v3 instead.

• OpenVPN Connect v2 for macOS
  sha256sum: 058a8d2c5b3817722a0474eb004e77d551726e710a4fb17c4fa34a81faa6fa2a
• Official release notes (change log)

官方地址：https://openvpn.net/vpn-server-resources/connecting-to-access-server-with-macos/