I was wondering which is the best total protection (virus checker) for my new mac pro ?.Any ideas chaps ?.

Gary gave you a good answer. There are no MacOS X viruses. You can't catch anything on a Mac by visiting a website, opening an email or clicking on an ad. There are less than 10 Mac trojans, there are over 1,000,000 Windows forms of malware. The Mac trojans in stuff like illegal torrents of Photoshop, fake codecs to view porn etc., require you to agree to download them, agree to install them and then use your admin password to activate them. Most any antivirus you use would slow your Mac down and protect you against nothing. You can get iAntivirus for free and if you are duped into installing a trojan, will remove it.

I don't understand. What do you need virus protection for? Do you have Windows on your Mac Pro? Are you sharing a network, or share external hard drives with Windows computers?

If you are running Windows in Bootcamp or with virtualization, you should install a windows antivirus app in that environment (like avast or nod32)

If you are sharing a network or external discs with windows computers, you may want an Antivirus configured to scan hard drives as they are connected to the Mac, to help stop the spread of Windows viruses on disks shared with the mac.

If you want software to protect you from catching a "mac virus" you are out of luck. There a few different anti-virus programs available for mac, but there is zero real information about which kind is more effective. That's because there is not a single real world "mac virus" that can be used to test the effectiveness an mac antivirus program.

the whole idea of a "mac virus" is still theoretical, despite the fact that Mac OS X has been around for 10 years, and 100 million people use it to surf the Internet everyday.

Well i don't know but you can choose the soft wares on my list i gave you: -http://en.wikipedia.org/wiki/List_of_antivirus_software
search one on Google to learn more about each one that can support on mac os