Other posts here by actual Mac programmers say otherwise. The gist of the hint I was given is that the disk-level hacks CL uses for software protection in P5 are unsupported by Apple, Apple refuses to support disk hacking (bad boot blocks, etc.) in OSX and was very clear on this point to developers, Apple offered viable substitute protection plans and CL isn't interested in those alternatives. In short (according to these suppositions) CL isn't telling the complete truth about porting to OSX. Don't be quick to blame Apple.