Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

When this started occurring, did anything change/update on your Mac recently that coincides with this?

When you reinstalled the game, did you delete the locally saved content (located in the /Library/Application Support/FINAL FANTASY XIV/ folder)? Does this error still occur after that folder is deleted?

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!