Non importa lo scopo di lucro, il punto è che che la licenza di Mac OS X vieta esplicitamente quello che intendi fare:
2. Permitted License Uses and Restrictions.
A. Single Use License. Subject to the terms and conditions of this License, unless you have purchased a Family Pack or Upgrade license for the Apple Software, you are granted a limited non-exclusive license to install, use and run one (1) copy of the Apple Software on a single Apple-branded computer at a time. You agree not to install, use or run the Apple Software on any non-Apple-branded computer, or to enable others to do so. This License does not allow the Apple Software to exist on more than one computer at a time, and you may not make the Apple Software available over a network where it could be used by multiple computers at the same time.
Comunque ho sempre saputo che si dicesse "triple boot", non "trial boot".