Of course, it probably didn't work very well since that OS is tethered around Apple's hardware (I don't mean that in a bad way -- just pointing out differences)... and I don't think Apple liked it much that their OS was being used where their hardware wasn't.
For all practical purposes, the Intel Mac hardware *is* generic PC hardware, so there is absolutely no technical reason why it couldn't run on a stock Dell machine, other than some artificial checks... Which apparently have been removed by some enterprising hackers already.