@Mattmasterv 

Historically, drivers for MacOS after 10.14 have not been possible.  Apple decided to change the architecture, which blocked most network adapters from having drivers made for OS 11 and beyond.  What they did was block legacy kernels from loading.  Since most chipset makers developed drivers based on these or the Deprecated Kernel APIs, their ability to make drivers for newer MacOS stopped.  

Right now we do not have any adapters that support MacOS beyond 10.14