should I turn on Firewall on my iMac - Yo… - Apple Community

Change Firewall preferences on Mac - Apple Support 11 rows About the application firewall - Apple Support Block all incoming connections. Selecting the option to "Block all incoming connections" prevents … Mac Firewall: Things That You Should Know | Firewall Guide Mar 19, 2020

How to use the OS X firewall | Macworld

It also protects your computer from common security problems. When the Smart Firewall is turned off, your computer is not protected from Internet threats and security risks. If you need to turn Smart Firewall off, you should only turn it off for a specified duration, after which it is turned on again automatically. How to Disable the Firewall on a Mac in macOS High Sierra

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