This would be a solution if it weren't for some of the Macbook Pro Retina 15" having a base SSD of 256GB. Just on a windows install you lose 30GB-ish. Add FFXIV, around 20GB, and you are giving 50GB hard disk space for free. I'm not quite sure of earlier models have only 128GB instead.

Sadly, not even the most current line of Macbook notebooks can run this game properly. You'd think SE would learn from FF14 1.0. If this situation continues maybe top of the line MacBooks released by the end of 2017 will work properly.