Sounds like a self-fulfilling prophecy when an anti-virus software company starts to spread rumors that OS X will become a target with hackers once its market share increases. Is this just a scare tactic or is there some truth in the idea that if Apple gains market share then hackers will start to hack?
This is my take on the subject. Yes, there may be an increase in attempted hacking and some hackers might do some damage, at least on computers owned by gullible people. What Symantec aren't admitting is that OS X is a rock solid operating system that is more difficult to hack in the first place and even when security issues appear, Apple is very quick to bring out updates and these can be downloaded and installed automatically. Given that hackers appear to like a challenge, it would seem to me that they would have been targeting OS X all along, and not wait until the user base increased from 2% to 5% or whatever the market share is and may become.
Then again, is all this a Windows driven conspiracy? I guess the EU needs to find out!