Research the term "Hackintosh".
Interesting, and an option for the technically inclined, but to do this violates the EULA for the OS which may mean something to folks who value support - admittedly not likely the crowd that would do this anyway.
I think for the purpose of this discussion, the Hackintosh may not really be a useful comparison - Windows can be installed and supported on any hardware it runs on and OSX support is gone if you don't pay the premium for the approved hardware.
HA ha ha haha haha. This is funny. A person that would actually call a company for tech support wouldn't know where to start when it comes to installing OS X on non Apple hardware.
And there is no need to pay Apple's outrageous prices when you can build better for cheaper.
OC'ed i7-920 to 3.8ghz
6GB RAM
1.8GB Nvidia GTX 295
Blu Ray burner
30" monitor
etc... etc...
All is installed, recognized, and works correctly with OS X. I payed $2,700 for the computer and monitor. That's the price of an entry level Mac Pro?