How to Turn on and off Firewall on Your MacBook Pro/Air/Mini
13How to Turn on and off Firewall on Your MacBook Pro/Air/Mini.
Understanding why the firewall isn’t enabled by default and whether you should enable it first requires understanding what a firewall actually does. It’s more than just a switch you flip to boost your security, as it’s sometimes understood by Windows users.
Firewalls like this one do one thing: They block incoming connections. Some firewalls also allow you to block outgoing connections, but the built-in firewalls on Mac and Windows don’t work in this way. If you want a firewall that will allow you to choose which programs get to connect to the Internet or not, look elsewhere.
Don’t configure your firewall unless you’re sure that you know what you’re doing. Otherwise, you may weaken the firewall or lock programs from accessing the Internet and not know how to repair those problems.
This tutorial will apply for MacBook Pro, Air, Mini's running the macOS operating system. This tutorial was performed on a macOS Big Sur system.