A message popped up on my 12 yr old iMAC that I have a virus and to call a certain phone number which I won't do. How can I tell if my iMAC has been infected with a virus or malware?
How can I tell if a virus or malware has infected my 12 yr old iMAC? A message popped up saying a virus has been detected on my system but I was able to reopen my computer.
iMac 21.5″, macOS 10.13