Some additional tips for you:

1. You indicate you're already aware there is a Mac version that would allow you to run it on Mac OS natively. I don't personally know what the performance differences between that and what you're doing now are, though. And I suspect Mac and PC have separate licenses to purchase just like PS4 is different from PC. But again, my own personal knowledge is mostly limited to "There is a Mac version." I also recall they were unhappy with its original performance, pulled it, and then re-released it when they were happy with it later (much like FF14 itself). But it still seems surprising that a Windows version on a Mac pretending to be running Windows would perform better than the Mac version running directly on the Mac, regardless of what specific sort of Mac we're talking about.

2. You may notice some slightly unexpected results from playing on multiple machines like this. Firstly, user interface customization like the HUD layout and hotbar configuration are stored locally on the specific device, not on a cloud like your character data. There are, however, launcher options to export and import such configuration manually.

3. Logging in from different locations and devices tends to present some security alerts. I'd recommend using one of the one-time password options if you aren't already. Doing so will save you from needing to go through other, more annoying, hurdles when it sees you changing locations and machines.