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Anti-virus software: Good
Bitdefender, Malwarebytes: Bad
I think you reversed those two group.
[doublepost=1566850841][/doublepost]Unless I am mistaken, antivirus software is pointless for Macs, but anti-malware is helpful.

Have things suddenly changed?
 
Advanced Persistent Threats. These are new extremely powerful cyberweapons that are a step way up from the old days. You can be exploited on a fully up to date machine in many cases if you're targeted.

The best one available now is Cylance. It is cost effective, extremely lightweight, and targeted mostly at enterprise. We get to benefit from AI based malware protection by Blackberry.
 
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