When they really need to. But they'll fight it hard! Apple's business model is to lock everything down -- very closed indeed. This does not align with the goals of bitcoin, at least, how I perceive them.
tl;dr Apple = closed. BTC = open.
I don't think this moment will happen. Bitcoin and Apple have a different uniques style.
Bitcoin has no rules, Apple rules everything that they got, including its patents etc.
Why what you say can prevent taking bitcoin as a payment for your products. Bitcoin is a means of payment and no matter what goals it pursues. The biggest problem is the enormous volatility of crypto-currencies, because of which many companies refuse to take bitcoin.