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Cannot enable firewall on MacOS

Once I updated MacOS High Sierra to 10.13.2, the firewall could not be turned on. In the McAfee Total Protection console, I am seeing "Turn on Firewall", with a "Turn on" button. When I click that, the console refreshes and I once again see "Turn on Firewall".

I read Document ID TS102623. Going into firewall settings, it says "You're not connected to a network right now", which of course is not correct (note that all other functions of Total Protection that use the network seem to work).

The document suggests that, if the firewall cannot be turned on, the user run the McAfee Virtual Technician. However, this does not seem to start using either Chrome or Safari on MacOS. Although not disclosed in the document mentioned previously or on the MVT page, I read in this community that MVT is not available for Mac. This leaves me with no known documented solution to my problem.

If anyone in this community has solved this problem, please let me know. I could not find a post on this. Thanks.

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