If one is looking for a new computer (Desk top or Lap top) may I suggest the following sites for reviews:
http://www.consumersearch.com/laptops
http://www.consumersearch.com/desktop-computers
http://www.consumersearch.com/apple-laptops
As for virsus' on Mac's, I just had this conversation with one of my cousins as well as a close friend both who changed to Mac's from PC's and did not have any kind of security program on their new systems:
"Internet security for Mac and Linux:
Computers running Macintosh or Linux operating systems are less susceptible to viruses than those running Windows, because most viruses specifically target Windows computers. However, the alternative operating systems are vulnerable to other types of malware, especially spyware and adware embedded in cookies. Non-Windows computers are also capable of sending viruses to Windows computers via e-mail. For those reasons, experts say that even Mac and Linux users should consider security software.
We found far fewer reviews for Mac and Linux software than for Windows software. Macworld is a good source for Mac software reviews, and has reviewed some Mac antivirus software. Intego's VirusBarrier is noted as "best for its scanning speed and its well-integrated Mac features." Macworld's Rob Griffiths says, "Norton AntiVirus is a close second, thanks to its extensive virus information and its strong handling of Windows viruses." Intego also offers several Internet security suites in its Internet Security Barrier X4 product family, and Symantec makes a version of Norton Internet Security for Macintosh. PC World's Scott Spanbauer asserts that Linux is the safest operating system. He recommends supplementing with free software."
http://www.consumersearch.com/intern...urity-software
and this link:
Macintosh Viruses and Mac Virus Resources:
http://antivirus.about.com/od/macint..._Resources.htm