Do Mac's require Firewalls

I will be receiving my first Mac on Tuesday. It is my understanding that Mac's do not need anti-viral software. If this is not true, please advise.
How about Firewalls...is this something I need to look into? If so, what works well on Mac...
Thanks from the coast of NC

See:
Do You Need Anti-Virus Protection for Your Mac?
According to Rich Mogull's article, Should Mac Users Run Antivirus Software?,
"The reality is that today the Mac platform is relatively safe. There are hundreds of thousands of viruses and other malicious software programs floating around for Windows, but less than 200 are known to target the Mac, and many of those are aimed at versions of the Mac OS prior to Mac OS X (and thus have no effect on a modern Mac).
It's not that Mac OS X is inherently more secure against viruses than current versions of Windows (although it was clearly more secure than Windows prior to XP SP2); the numerous vulnerabilities reported and patched in recent years are just as exploitable as their Windows equivalents. But most security experts agree that malicious software these days is driven by financial incentives, and it's far more profitable to target the most dominant platform."
Mr. Mogull is a computer security expert. I recommend reading the entire article as it is quite informative.
For additional information on viruses, trojans, and spyware visit The XLab FAQs and read the FAQs on viruses and spyware.
OS X has firewall software built-in to the OS that can be activated in the Security preferences. If you have a hardware router it most likely already has an active firewall built-in.

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