virus warning on macbook air

Hello gabaretha,

If you're unable to just close out of that pop-up, try force quitting and reopening Safari.

How to force an app to quit on your Mac

If Safari is still going back to that pop-up when you reopen it, clear the browser history.

1. In the Safari app on your Mac, choose History > Clear History, then click the pop-up menu.

2. Choose how far back you want your browsing history cleared.

Clear your browsing history in Safari on Mac

Recognize and avoid phishing messages, phony support calls, and other scams

Cheers!

Ignore it. There are no viruses that affect Macs and anything alleging the contrary is a scam.

Provide some more information regarding how that warning appears (a popup webpage? Text message? Phone call?) so that we can help you avoid it in the future.

Hi gabaretha,

You're very welcome.

Have a nice day!