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 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.
Step 1. Open the ‘System Preferences‘ app on the Mac or MacBook.
Step 3. Next, click on the ‘Lock‘ button and enter your device password to enable changes.
Step 4. Click on the ‘Turn On Firewall‘ button once the lock icon has been disabled in the previous step.
Once you do this, click on the lock icon again to disable changes and then, for safe measure, reboot the Mac or MacBook system, and now, the Firewall on your device will be active and in full effect. From that point on, if the system detects any suspicious attempts from the network, or from an application you have downloaded and installed on the system, it will flag it and alert you simultaneously, so that you can take the appropriate actions.