A FBI Ransomware page is “being pushed onto unsuspecting [Mac OS X] users browsing regular sites but in particular when searching for popular keywords,” reports “Malware Intelligence.”
Warnings appearing to be from the FBI tell the victim: “You have been viewing or distributing prohibited pornographic content. To unlock your computer and to avoid other legal consequences, you are obligated to pay a release fee of $300.”
If you choose to ignore the message (which you should), you cannot get rid of the page. You can see a video on how to remove this Apple ransomware at http://tinyurl.com/lsgqlxx .