One reason is the growing popularity of the platform, both with consumers and with those who wish to target the Mac. In the past, Mac users were less vulnerable to malware because there were far.
The likelihood that you have any viruses on your Mac is pretty close to 0% as there are currently no know Mac viruses in the wild (last I checked). What is more likely is that the AV software you downloaded mistook normal, benign files as viruses. There are other types of malware that can cause problems.
The Best Mac Antivirus Protection for 2021. Despite what you may have heard, your Apple computer is not immune to malware. We test the top contenders to identify those offering the best Mac. Protect your Mac from malware. MacOS has many features that help protect your Mac and your personal information from malicious software, or malware.One common way malware is distributed is by embedding it in a harmless-looking app. A quick and efficient antivirus app is a vital tool for keeping your Mac safe. You need antivirus software for protection, but remember that it’s not a cure-all solution. You must also practice.
You don't need AV software on a Mac. While you have have some malware on your computer, it's not the first thing I'd consider if the computer was running slowly. To start, I'd look at Activity Monitor and see what's going on. AV software itself is notorious for slowing down Macs.
For more in depth diagnoses, use Etrecheck.
Why Virus Is Good For Macs
Feel free to post the results here so people can help you figure them out.
You might also run Malwarebytes:
Why Virus Is Good For Mac Pro
May 31, 2018 10:06 AM