With Macs and Linux generally you scan for viruses to prevent yourself from delivering viruses to MS users. This is not to say there are no viruses for them, but there are very rare.
There is quite a funny spoof on the steps needed for a virus to be installed on the first two OS's
http://www.gnu.org/fun/jokes/evilmalware.html
What it boils down to is not that there are no threats on Mac's or Linux, but there are different types of threats. The things to scan for are rootkits, the two favourites of mine are:
rkhunter
http://rkhunter.sourceforge.net/
chkrootkit
http://www.chkrootkit.org/
both are supported by macs
there are plenty of other things you can do such as
parsing your log files.
doing an audit of your files.
running a intrusion detection program, sorry I don't know one for mac, but psad is the one i use for nix.
Basically scanning for viruses is quite low down on the list, and normally is done because nix/mac users are considerate to windows users hence the first place you normally find av is plugged into the mailing agent.
*Edit*
And I just realised I just repeated what SeijiSensei said
Quote:
Originally Posted by Potatochobit
naw, just use norton internet 2007. but the problem could have arrised from the older norton not uninstalling completey. also HP computers come with goofy pre-installed software that are annoying. I thought about gettting zonealarm as my other choice.
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You can normally run a cleaner to make sure it uninstalls correctly:
http://service1.symantec.com/SUPPORT...05033108162039
zonealarm has always scored very highly on the top10 firewall review site and i haven't seen it slated on wilders . but personally I have never used it, I went from kerio 2.15 to outpost firewall