Firewall?

Started 1 month ago | Questions thread
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Normo Forum Member • Posts: 53
Firewall?

I have an iMac and have been hacked recently.  I am a computer illiterate.  My brother in law suggested purchasing malwarebytes for the computer and also to check the settings and my firewall was off.  He urged that I turn the firewall on.  Is this a good idea.  What happens good or bad with the firewall on?   And what options should I pick for the firewall.  I have OS 10.12.6.  Thanks.  Norm

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