Norton for OS X caused as much damage as the worst virus imaginable. Some claim it wrecked hard drives permanently. It was so bad even Norton gave up trying to fix it and pulled out of the Mac market, leaving those whose drives it wrecked in the lurch. Turned out no one needed it, anyway.
Norton anti-virus, still sold for OS X, is like the blob that ate Chicago. Its tentacles spread everywhere and is a resource hog whose ravenous appetite for cycles cannot be assuaged. And it's useless, as is any anti-virus app for the Mac. As an exec at Norton acknowledged a couple or three years ago, it searches for Windows viruses only because there are no Mac viruses with which to build a data base.
This is no different than every other Mac anti-virus app, but Norton runs much
slower than every other anti-virus app. Complete crap.
This story dates to 2002 and gives some idea of the problems Norton could cause.
IE was a security sieve, didn't (and still doesn't) follow web standards (MS in its hubris tries and fails to railroad its own "standards") and fell way behind other browsers. Tabs
finally were introduced when, last year? This year?
MS dropped Mac support in 2005, not that anyone who cared for it was heard over the cheering.