The steps in this guide were performed on a MacBook Air in the MacOS High Sierra operating system. If you find yourself in a situation where you have a program or hardware that can’t communicate with your MacBook because of the firewall, then continue below to find out how to disable the firewall on a Mac. Your MacBook that is running the macOS High Sierra operating system has a built-in firewall to prevent unauthorized connections across the Internet from gaining access to your computer.īut while that firewall is good at keeping out malicious connections, it also does a good job at keeping out connections that actually aren’t harmful, but may appear to be unusual or atypical.
