My board is well done, with outline. I'm not a newbie
I have no problem with it under MS-Windows Diptrace version, the 3D models that I use all work under MS-Windows Diptrace too. And when I use the same files with your "MacOS version", it sometimes (rarely) works, but most of the time it doesn't (see the screeshot). And when it works, if I change the size of the window, the 3D view is distroyed as you see on my screenshot too. Conclusion: You've made a mistake somewhere or you missed something in your MacOS solution.
I think that you should stop a while to point on the 3D models that I use and you should take account about an assumption of a problem between Direct3D and Wine. It would not be the first time that there is the problem with it for many PC software used with Wine (or CrossOver).
Sorry to tell you but I think that your Mac version based on Wine is a poor man's developpement solution. Unless, you can give me a solution, next week I'll talk with my boss to think about another EDA solution for the Mac computers of our company.
And I am disappointed because Diptrace for MS-Windows is a great software.
But we'll keep an eye about your future and real MacOS version.