While I'd love to recommend you the Portmaster, it unfortunately is not yet available for MacOS. https://safing.io/portmaster/ https://safing.io/portmaster/ Bu

While I'd love to recommend you the Portmaster, it unfortunately is not yet available for MacOS. https://safing.io/portmaster/ https://safing.io/portmaster/ But you actually have already paid for something like that, it just isn't Open Source: MacOS itself. You can use parental controls to block domains system wide, afaik.