^^^ I agree; MacBooks, fair and simple, are not suited to be gaming laptops. You can spend much less money and achieve much greater performance on a PC or Laptop from almost any other brand. MSI, ASUS, DELL, or perhaps even Lenovo. I personally do not recommend Alienware, as there is a large chunk of "merchandising" price that goes into the total price of the product.
My main point? Purchasing (or looking into) some of the brands listed can get you great performance for the same-isa price, if not lower, than a MacBook. I am trying not to sound too brutal here, but you will find that the vast majority of support is also aimed towards Microsoft Windows in the general flight simulation community, though X-Plane supports iOS, Windows, and Linux.
Adjusting to Windows can take a little time, but it is well worth it. :) I use both iOS and Windows on nearly a day-to-day basis and I personally prefer Windows and I think you will also like it.