Safing Portmaster

More ambitious than a plain firewall: it monitors and controls every app’s network activity with a friendlier interface and built-in privacy features, which lowers the bar for non-experts. The trade is that it is heavier and more opinionated than something like simplewall, and that overhead is real on lower-end machines. A strong pick if you want application-level network control with guidance built in; minimalists who want a featherweight blocker will prefer simplewall.