Thank you for the reply cpaek72.

I apologize for the very long delay in our response in regard to this concern. The problem may lie in the graphics card as it may cause problems when running the game. The issue could also stem from a combination of that and the Mohave update. For further information in regard to this, please use this link to take a look at the Mac specifications:

https://na.finalfantasyxiv.com/product/#spec

Once again, I apologize for the delay. Hope to see you online !