Mac OS X cracking

thanks for all the information...i found most of them too but nearly all of them
were about hacking not cracking...
i don't want a click-n-crack tool i only search for particular information
how others attack protections on the mac, i'm really aware of the fact that
i have to learn the basics of the system...
i'm not a beginner in this art, but only for the mac system...

the only thing is i didn't want to invent the wheel again...i saw some
cracks/serials for mac apps and i was wondering how those guys succeed...

anyway thx