Just got a mac, anti virus and other questions?

Well i just got a imac

I don't want to pay for antivirus software, i get norton free with my internet service should i go with that or do avg or something like that, what is good for a mac?? any other spyware software, etc..i should get beside antivirus?

Second question how do you take care of the imac to make sure its always running smoothly?

Like with xp i use to:

Delete cookies and all internet files etc

run disk clean up

run disk defrag

run scan disk/check disk

then run antivirus, spywares, etc...

Every week or two.

Is the mac different?? how do you maintain a healthy mac lol??

Just got a mac, anti virus and other questions?live update

Okay, it is a myth that Macs could get viruses. Really, people have tried but not succeeded. (They could get hacked theoretically, but there are very few Mac hacks, and anyways this is different from viruses which spread by themselves.) And it is a myth that there are no viruses simply due to a lower market share. There are probably more unprotected Macs than unprotected Windows computers, yet there are 200,000 Windows viruses and 0 Mac OS X or Linux viruses (since these operating systems are Unix-based).

You don't need internet security software. Norton will say Macs aren't more secure than Windows, even though this is totally not true, just because they want your money.