Wintermute said:
Time and effort? They built EFI INTO OS X for the MBP or do the old PowerPC Macs use EFI as well? Is my ignorance showing?
No but you are suffering from TLA overload.
The loss of profit is from making a marginal profit of an OS X license versus making a larger profit off of a Mac sale. The time and effort is in shifting from a hardware centric company who makes software that supports it to a software company who sells compatible hardware. Those are two very different business models. Apple is the whole package or nothing at all, start selling software for beige boxes and the business changes quite a bit.
When you start selling OS X for beige boxes support goes up. Even if they did only supported Apple hardware there would be a large # of customers who would try anyway. "But my system has been working fine, so it has nothing to do with the hardware." kinda calls.
Then there are the lost hardware sales. Does the increased # of software sales offset the loss from hardware? if so how much is the extra support infrastructure you are going to need? Can the hardware side survive a transition where they are an option not a requirement?
Put simply, it is not a simple question of "Why doesn't Apple just sell OS X for any hardware we want to install it on?"