Since a few weeks ago, members of my family have been plagued with junk mail/spam. We ignored it, thinking it was nothing. More recently, we have received blank emails from known contacts that link to random websites and we have received strange text messages from unknown numbers advertising random things such as Viagara. I am concerned because we share one iMac which all of our iPhones are synced to. Is there possibly a virus on the Mac that has taken our information/contacts? That seems like the only possible reason for all this to happen at once. Any help provided is much appreciated. Thanks in advance!