Not rekindle the argument here, but.... I find your some of your claims to be a bit specious.
TRUE:
1) "Hackers can get anywhere.", I will not argue that ANY system can be hacked!
2) No questions hackers focus more on Windows
Possible.. maybe even probable, but unfounded:
"As Apple pentrates the PC market more, there will be attacks against them will increase."
False:
1) "MAC OS is just as vunerable as windows."
There is No question there are vulnerabilities within OS X, but cummon... Windows registry is a NIGHTMARE. Windows is much more vulnerable. Moreover Apple is much more proactive with security updates and more successful (considering the hardware/software connection). OS X is without question more stable and less vulnerable, not to say impenetrable!!