How to determine if the "13 Viruses Detected" pop-up on MacBook Air is a scam?

Stop unwanted Notifications - Apple Community may also be applicable, in addition to Phony "tech support" / "ransomware" popups and web pages - Apple Community.

They are just different manifestations of the same scams.

annajeanne wrote:

Thank you Ozzie1910. When I open,safari / settings I find nothing that says notifications. . I have looked in the general tab and advanced tab. Could it be called something else? I appreciate your help

It is actually at Safari > Settings > Websites > Notifications. Delete everything you have there, unless you specifically want a known website to give you a Notification in the upper right corner of your screen.

annajeanne wrote:

Thank you Ozzie1910. When I open,safari / settings I find nothing that says notifications. . I have looked in the general tab and advanced tab. Could it be called something else? I appreciate your help

From: Stop unwanted Notifications - Apple Community

With Settings opened, tap on Websites at the top, then scroll down and select Notifications in the left column.

Some notifications will show as nearly-blank entries in the list of websites shown at the right. if the perpetrators are trying to hide their entry, you’ll see an Allow/Deny at the right, and not much else. You’ll need to delete those entries.

Go to safari / settings/ notifications/ delete everything from there , none Mac can’t get infected with virus that’s fake alerts

All such messages are scams presented by criminals. Close the offending page and avoid sites that are involved in such bogus advertising tactics.

Phony "tech support" / "ransomware" popup… - Apple Community

its no big deal I get it all the time and nothing happens. They’re just trying to scare you.