I want to fix my Mac from virus

There are Microsoft Windows Viruses and they do not effect Apple's macOS

Suggest you refer to a prepared User Tip by a respected contributor which may contain important information on this issue

refer below

Stop unwanted Notifications - Apple Community

What are the symptoms of this “virus”?

I think there is a virus infiltrating my Mac is I want help to fix that

Not possible. As stedman1 asked, please tell us what you are observing that makes you think your Mac has a virus?