Security issue: malware on iMac?

While online today (iMac Ventura 13.7.4) I received a popup saying that 4 viruses/malware were on my iMac; also a notice that a McAfee subscription was expiring today & I need to renew now. I don't have a McAfee subscription. I immediately shut down the iMac. How do I check to find if the iMac does in fact have malware & how do I get rid of it. I did not download anything as far as I know!

iMac 24″, macOS 13.7

Posted on Mar 20, 2025 10:54 AM

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Posted on Mar 20, 2025 11:29 AM

There is no malware here, and absolutely nothing wrong with your Mac.


Somewhere along the path on some website or ad network or such, you were offered notifications, and accepted those, and now no longer wish to receive those notifications.


Kurt Lang has the info for disabling notifications, and preventing future prompts to send these.


Here’s a related user tip: Stop unwanted Notifications - Apple Community


Oh, and the pop-up lied. There is no malware here, and pop-ups cannot scan your Mac. Again, the pop-up lied about the scan, and lied about viruses. There was no scan.


Malware scans are deeply intrusive, blocked by every web browser, and a website hypothetically able to do that deeply-intrusive scan would just rip off everything on your device and not bother with the rest of the lying.


This was an advertisement, and a very effective one.

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Mar 20, 2025 11:29 AM in response to cabl8825

There is no malware here, and absolutely nothing wrong with your Mac.


Somewhere along the path on some website or ad network or such, you were offered notifications, and accepted those, and now no longer wish to receive those notifications.


Kurt Lang has the info for disabling notifications, and preventing future prompts to send these.


Here’s a related user tip: Stop unwanted Notifications - Apple Community


Oh, and the pop-up lied. There is no malware here, and pop-ups cannot scan your Mac. Again, the pop-up lied about the scan, and lied about viruses. There was no scan.


Malware scans are deeply intrusive, blocked by every web browser, and a website hypothetically able to do that deeply-intrusive scan would just rip off everything on your device and not bother with the rest of the lying.


This was an advertisement, and a very effective one.

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Mar 20, 2025 11:06 AM in response to cabl8825

Per Zurarczurx's suggestion:


If these are sliding in the from the top right of the screen, a site you visited has given itself permission to send push notifications. Everything you're seeing is nothing but a scam.


Open Safari's preferences (Settings). Click on the Websites tab and then scroll down to Notifications. Clear any entries in the right hand window. You might find something similar in the Pop-up Windows heading below that. Block any you don't recognize.


Then if you want, uncheck the box to the right, as shown below here.


I personally can't think of any reason why I would ever want any website to push notices to me.


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Security issue: malware on iMac?

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