Your Mac’s Firewall is Off By Default: Do You Need to

About the application firewall - Apple Support Block all incoming connections. Selecting the option to "Block all incoming connections" prevents … Change Firewall preferences on Mac - Apple Support 11 rows How to Disable the Firewall on a Mac in macOS High Sierra Aug 12, 2018

This command lets you turn the build in OS X firewall on and off, on both for specific services or essential services. It works with OS X 10.5, 10.6, 10.7 and 10.8. It also works via Apple Remote Desktop. If you like this article, consider sponsoring me by trying out a Digital Ocean VPS. With this link you'll get $100 credit for 60 days).

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Correction to your wrong answer: when McAfee Firewall is on, Windows Firewall should be off, but in Services the Windows Firewall Service MUST be started and automatic as it monitors all firewalls for Windows security.

Turn Windows Firewall on or off in Windows 8 | Dell US Jun 26, 2018