"Macarena", the song that you either loved (it was one of the biggest hits of 1996) or hated, has come back to haunt us. The good news: not as the song. The bad news: it has reincarnated into OSX.Macarena - a virus that targets client and server editions of Mac OS X 10.0.0 through 10.4.8.

Symantec says the current version has a lowest-possible threat rating and doesn't carry a malicious payload. But since the source code for the MacVirus has gone public, the company does not discount the possibility of more dangerous variants in the future.

OSX.Macarena targets some, but not all, Mac OS X Mach-O executables but does not infect PowerPC Mach-O binaries, nor Universal binaries for the PowerPC and Intel Mac platforms.

While the SANS Instituter's Internet Storm Center (ISC) said the Macarena MacVirus is "no big deal" it did say it should be taken as a warning to get anti-virus protection for Macs even if there are no viruses in the wild today.