Remember, Apple has paid to develop this OS for over a decade (if you include OS9 and earlier, it's over 25 years). Apple charges less for a copy of OS X than Microsoft does for Windows. Apple passes some of that charge along with the hardware, which allows people to upgrade the operating system more cheaply. They aren't looking to make big profits on software sales (as Microsoft does), they want to sell hardware. It also makes piracy less of a concern when they can make the software cheaper by increasing hardware costs. When cloners come in and don't have to account for those development costs, the hardware is cheaper. But it isn't fair to Apple in a business sense. Hell, at least when Apple allowed cloners, they had to pay Apple for the rights. Psystar doesn't do that.