Steve is a fool to make a mountain out of a mole hill in this situation. Apple needs McGraw-Hill more than McGraw-Hill needs Apple.
Do you have some basis for the claim that Apple needs McGraw-Hill more than McGraw-Hill needs Apple? Do you know how well McGraw-Hill is doing in the educational publishing market? MHP's market valuation is about 1/15 that of AAPL. MHP's share price is about half its 5-year high and about what it was 5 years ago. AAPL is at all-time highs and 5 times its price of 5 years ago. I think Apple will be just fine if they choose to exclude MHP.
Didn't people say that Apple needed NBC more than NBC needed Apple when NBC's shows were removed from the iTunes store? Apple continued doing just fine; the store grew. What kind of shape is NBC in? (Yes, I know that the content came back to the store.)