how do i check if my iMac has a virus?
I clicked on to a website and a message box came up advising me that I had been infected with a virus, it names the OS system of my iMac and click here to completely scan my machine and clean/rid it of the virus, I ignored this believing it to be a scam but how do I check if my iMac actually has a virus, and did I do right?
iMac, Mac OS X (10.7.5)