mac virus thing

hi all mac users... i know we've never had to worry took much about viruses unlike the pc boys and girls .... but her it comes... i got a trojan on my iMac whack changed keywords on web page text to ad links... and pics i.e. avatars to popups and weird audio ads would be triggered on mouse over events.... anyhow i got it sorted with mackeeper... but be aware ... there out there for mac now as well!
think this particular one is called tapisnake or suchlike....

Thanks for the info I don't use a mac but my son does so I will pass it on to him and his friends.