I got just the new macbook 13" and was surfing the web when a warning message showed up saying this webpage might be infected with malware. It give me the option "to proceed" or "go back to previous page". I selected the latter. I hope my macbook isn't infected with malware. Is there any software for mac that detects and scans for viruses/malwares? I know they are not as common as PCs but I heard there are still some out there. Btw- I was looking at someone's twitter page. Thanks.