I never thought I would want a "walled garden" on my desktop, but these shit software stacks that companies are integrating into their products are forcing me to want to fight back to lock down my machine. I would love a simple utility that could not only neatly encapsulate and display the data being sent from my machine out on the network but also allow me to merely check a box to block that traffic. A smart initial…
Does Little Snitch not meet your needs there? I believe even with the challenges caused by Apple's unfortunate elimination of kernel extensions it's still powerful and effective. The GUI is solid and I've had solid success over many years with it for this sort of thing.