What, really? What happens when you plug it in? Does it tell you that you can't use it? Does it lock you out? Does it brick the phone?
Ohhhh...you meant that you have to get an adapter. Of course you can plug the phone into the new MacBook. The only thing that might be absurd is that you might need an adapter to plug it in but, in reality, there's nothing that you'd really need to plug it in for anyways except to charge it and you get a power brick with every phone.