Well, I wouldn't say "less than PC's" specifically. More like, "Less than Windows computers". Because I have a PC on Ubuntu...and I'm about 99% sure I'll never get any kind of malware. Almost a week since I set it up, 0 anti-virus software or protection, not as much as a pop-up. Been surfing and downloading, etc. I'd put money on certain Linux distros being safer than both Mac and Windows, but definetly not all of them.