These nasty things are what I am finding all over the place. It shows a pop up on your Mac telling you that you have a virus and tells you to call a number to fix it and give them money. STOP! Do not call the number! Do not invest in Security Software for the Mac either as this is a Scam NOT a virus! Here is what you need to do to remove it:

1. Quit or Force Quit Safari by holding down the Option Key and clicking on Safari in the dock and drag up to Force Quit.

2. Launch Safari while holding down the Shift key to start it in Safe Mode

3. Go up to the word Safari in the Menu Bar at the top and drag down to Preferences

4. Find Privacy in the Tool Bar and click on it.

5.Click on the bar that says Remove All Website Date

6. Quit Safari then launch it again as usual