When it comes to your Mac’s security, one of the features on offer is the firewall. For those of you who are new to this, a firewall is basically, a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet.
Keeping the firewall on ensures that your Mac is protected from malicious applications and from dangerous network connections as well. By default, the firewall is usually turned off on the Mac, and if you want to turn it on, this is how you can do it.
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Open the ‘System Preferences‘ app on the Mac or MacBook.
