Does mac computer have viruses?

That depends on what you do, if you open the wrong downloaded file then have fun removing the possibly new virus you could have found. to prevent this run a virus scan on any questionable file you have downloaded before you open them. on a side note I don't think viruses segregate operating system from win or mac but i could be wrong

Does mac computer have viruses?trojan

Macs still are sublect to viruses, but the majority of viruses that are created are for PCs

Does mac computer have viruses?abtuvurys 2005

Yes it does. Only one though, no plural Macs here.???
Yes, rarely.
Yes, Macs do get viruses, as do Linux and Windows PCs.

No there's not "millions" of viruses on Windows, just like 150k or so. If you browse smart (use Firefox or Safari or Opera instead of IE), don't click on every single piece of spam you get in your inbox, you'll be pretty safe with Windows and an antivirus program.

Macs don't really need an antivirus program unless you're interacting on a daily basis with Windows machines (such as a corporate environment), because Macs can host viruses that Windows PCs are susceptible to.

And yes, if you code a virus for Windows, it won't work on Mac because the syntax is different. You have to specifically make a Mac virus in order for it to mess up Macs.