IMHO they should be able to create a computer that pretends to be a real mac.
The part that concerns me is "Circumventing any technological measure that effectively controls access Mac OS X, including, but not limited to, the technological measure used by Apple to prevent unauthorized copying of Mac OS X on non-Apple computers."
Why shouldn't they be able to make an OS X compatible machine? I agree they shouldn't be able to modify AND redistribute OS X. But shipping a machine that allows OS X to be installed seems perfectly reasonable. Activision went through this with Atari early on, making 'compatible software' and later on there are many cases of 'compatible hardware' that have been allowed. But these days the DMCA prevents this sort of thing,
"(a) Violations Regarding Circumvention of Technological Measures.—
(1)
(A) No person shall circumvent a technological measure that effectively controls access to a work protected under this title."
To me that is just unreasonable. As long as it is not a copyright violation, there shouldn't be any rules restricting your rights build your own device/software to interact with any other device/software if it does not cause any harm to 3rd party system. Although, I'm sure this gets sticky when writing an alternative WoW client or some such that 'cheats' or causes some other form of mahem, currently the line is drawn too far in favor of protection over liberty.