annettefromedinburgh Said:
"Virus Scanner: Thanks for your quick response, Have used the Malwarebites and nothing came up, however I am still getting popups telling me I have a virus. Do you know how I can stop these? thanks Billy”
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Where did you get this Mac? All of this shouldn’t have started, if you’ve just opened it. So, if used then just return it.
As an alternative, back it all up > erase the drive > reinstall the macOS anew, and then use Migration Assistant to get it all back. See if it goes away…
Getting the macOS Back:
Two Major Thoughts:
A. Restore form a Backup:
Did you create a backup of your Mac prior to all of this occurring? Is so, then restore from the backup. If not, then take this as a learning experience, knowing to always backup your Mac, prior making any major changes to your Mac (i.e. upgrading your MacOS).
or...
B. Reinstall the macOS Anew:
The ultimate workaround would be through a new install.
Reinstalling the macOS Anew:
Try This:
1. First, Backup your Mac, then
2. Then, install your macOS Big Sur anew.
3. Finally, migrate it over from the Backup created in step 1
In Depth:
1. Back up your Mac:
Start by Creating a Time Machine Backupof my Mac. That way I could be assured that Incan recover my Mac, should I need the App back or if anything goes wrong due to the removal. So, Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall.
2. Use a USB Bootable Installer:
Create a USB Bootable Installer for Big Sur. Delete the hard drive's partition. Then, install this macOS with. Go Here: How to Create a Bootable Installer for macOS - Apple Support.
3. Migrate and Reinstall Data and Apps:
Next migrate it over from the Time Machine Backup you created in step 1 to this new install.