I have not used Simplewall but I am a paid customer of Binisoft WFC and do recommend it. WFC works great and is frequently upgraded, the developer is very respo

I have not used Simplewall but I am a paid customer of Binisoft WFC and do recommend it. WFC works great and is frequently upgraded, the developer is very responsive to his users. It does have a crude ugly UI, so just don't expect it to look like Little Snitch (which I also endorse on MacOS) or Glasswire.