how to get rid of "apple.com.scan.live" virus on safari

  These is a scam pop-up. 

  Force Quit Safari

  “Press these three keys together: Option, Command, and Esc (Escape)

  Or choose Force Quit from the Apple () menu in the upper-left corner of your screen.

  Select the app in the Force Quit window, then click Force Quit”

  Launch Safari holding the shift key down.

  https://support.apple.com/en-us/HT201276

  For more info:

  Section: If you see pop-up alerts or ads

  https://support.apple.com/en-us/HT204759

  https://support.apple.com/en-us/HT203987

  https://www.thesafemac.com/tech-support-scam-pop-ups/

You may  have adware/malware installed. Try downloading this program which was written by Thomas R, a long time poster. The program will search for malware/adware The program will do the work for you which makes it easy. It may be necessary to run more than one scan. After running the scans, restart the computer.

Malwarebytes Anti-Malware for Mac      10.10 and later

Malwarebytes uninstall

You are welcome.

Your choice, but it is an often recommended program to try along with Etrecheck.