This Is the Best Firewall App for Mac I've Ever Used, and It's Free

Most people haven't actively managed a firewall in at least a decade, assuming they ever have. But keeping track of which applications are using the internet-and how much data they're using-is still useful at times, as is blocking apps from accessing the net entirely.

While you're traveling, for example, internet access might be limited, so it's a good idea to cut off applications that constantly churn through data. But even while at home, it's a good security practice to review which applications are connecting to the internet. And while macOS comes with a firewall, it's not really a useful tool for that.

Which is why I like FireWally. This totally free application, offered by the Ukraine-based indie Mac developers Nektony, isn't a tool for power users-it's streamlined and user friendly. Click the menu bar icon and you'll see a list of applications using the internet. You can see a summary of all traffic today, in the past hour, or monitor incoming traffic in real time.

Beside every application is its data usage. You can see a breakdown of inbound and outbound traffic for any application by hovering the mouse over it. You can block any application from accessing the internet by toggling the switch.

Credit: Justin Pot

What if you don't recognize an application? I, traditionally, ended up copying the name of the application and pasting it into a search engine. FireWally tries to save you some time by providing AI-generated summaries of each application using Apple Intelligence (assuming your Mac supports that feature). It's a useful way to quickly remind yourself what a particular application is, or to identify one you don't recognize.

It's a very streamlined application, but perfect for anyone hoping to understand a bit more about how much data their various Mac applications are using. Give it a spin if you're looking for a simple firewall application.