And Apple would be bankrupt within two years.
Last fiscal year, Apple's profit from Mac sales was about 40% of all of their profits or about $2.6 billion. Just to replace the income stream from the sale of the slightly more than 10 million Mac computers sold last year with the sale of OEM OS software, assuming a $50 profit on each OS sold, Apple would have to sell more than 53,000,000 units EVERY year.
In actual fact, bulk OEM OSes are actually only about $40 bucks of which only about $30 is profit. So now it would take the sale of 90 million units, or almost ALL PC sales in the US per year would have to run Mac OS just to break even with what Apple is doing now selling hardware...
Good thing YOU aren't running Apple.
An excellent example that Macs are a system and the others are commodity items.