What might possibly be the first "scareware" site for Macs:
MacSweeper, which offers to scan your Mac for security risks and then will fix them... for a price.
In at least one instance an F-Secure researcher visited the MacSweeper site and clicked a button labeled "Free scan." The scan highlighted Mac-related problems, even though the researcher was using a PC.Uh, yeah.
A user on one of Apple's discussion boards wrote that their Safari browser kept redirecting to the MacSweeper site, a sign that malicious scripts may be involved.DANGER WILL ROBINSON!
In short: keep away from this piece of crap site / "software".