Zane H. Healy said: >Have you seen a Mac virus since the days of System 6 or early System 7? Yes. There was even a virus that could take advantage of Outlook Express under OS 8/9 and mail itself out to other computers: The Simpsons virus: http://vil.nai.com/vil/content/v_99102.htm http://www.macintouch.com/simpsonsvirus.html It isn't that there were no viruses that could infect OS 8/9, it's just that as floppies became less common, the vector that the majority of classis Mac OS viruses were designed to be propogated by, they became less common. In the DealMac forums is a discussion entitled: "Have you ever caught a Mac Virus?" You might like to read the comments. http://dealmac.com/forums/read.html?f=1&i=952391&t=952391 Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) Routine OS X Maintenance and Generic Troubleshooting http://www.macattorney.com/ts.html