Show me where you have "purchased" software and not "purchased" a license. You can't. You do not own the software. You own a license to USE the software. That license has limits on how you are permitted to use that software. If you owned the software, you could, with impunity, make copies and sell them to anyone. I don't suggest you try that.
By the way, Psystar has admitted in recent motions that they were infringing the copyrights on OS X Leopard and have even told Judge Alsup that they are willing to accept a "nominal" fine for doing so. They say they are willing to admit this now because neither they nor Apple are currently selling Leopard (which is not true. Leopard is still available for older Macs.) Talk about cheek. They've been arguing for almost two years that they are not infringing, but once they stop—for this particular product—they say, "Oh, all right, we were infringing. Give us a slap on the hand and end this case." They also maintain that their admission of infringing OS X Leopard does not mean that they are infringing OS X Snow Leopard... while doing exactly the same thing they were doing before. Insanity.
You persist in arguing that a license term that may be unenforceable must be treated as enforceable. That is simply not the case, as Autocad and many other companies have found. You will never disagree with Apple that it can say anything it wants in a license. I will never agree with you that Apple can enforce those terms. What you can not show me is any legal authority that prevents me from using Apple’s OS on my PC. You can’t. You can repeat Apple’s legal arguments, sure. But that would make you a PR flack, or spokesman, not a thinking FReeper.
By the way, my arguments have nothing to do with Psyster. If Psyster wins its case (which I highly doubt), then consumers would likely be covered by the holding, but the converse is not true. If Psyster is not allowed to make Apple clone computers and install the Apple software on them, it does not mean that consumers cannot buy Apple software and install it on their own PCs. Consumers are not trying to make money using Apple’s IP, they are just buying Apple’s software and then using it on a computer on which it works.