This is one reason why the DMCA and its application sucks. It's bad enough that the tool needed to make a fair use copy of a DVD is considered a "circumvention device" because it can lead to unauthorized copies. But this tool isn't even used to copy OS X.
I'll give an example. Lexmark sued third-party toner manufacturers under the DMCA. Lexmark had put an access control on their toner cartridges to lock out third-party manufacturers, the manufacturers reverse-engineered it and produced cartridges for Lexmark. Lexmark sued and lost.
They didn't want other cartridges on their printers. Apple doesn't want their OS on other hardware.
Indeed, I have a copy of SimCity 4 which has a defective play-disk [sometimes it won’t be recognized by the DVD drive]... which means I have to get on the phone with EA talk to them, send the disc, wait, get the disc, re-install and THEN get to building cities...
and yet if I were to download a copy of the image files, burn a copy of the disc, and play on that the legal system could/would call me a “software pirate” despite the caveat wherein you ARE allowed to make backup copies of software.