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Explore the world of Mac. Check out MacBook Pro, iMac Pro, MacBook Air, iMac, and more. Visit the Apple site to learn and get support.
May 24, 2018 Firewall on/off? - Apple Community May 03, 2011
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A firewall can help keep other computers from connecting to it when you don't want them to, such as when you're on the Internet or a network. However, it will still allow you to browse the web using Safari, for example. Choose Apple menu > System Preferences. Click Security & Privacy. How to Customize Your MacBook’s Catalina Firewall - dummies