@ubernaut Thank you for your help.
@larsonw26 The file you provided loads perfectly fine here. So we can condense the issue to be solely MacOS-related. I have edited the headline of this topic to reflect the actual issue.
This link takes you to All triplea maps https://github.com/triplea-maps
Select the map you want. We will use “global_40_expansion_uhd_boxes” for our example.

Hit Big Green Button “Code” On Right and DL ZIP

Open Zip and Rename Folder by removing “-master” at the end to 'global_40_expansion_uhd_boxes" and place in your “downloadedMaps” Folder inside your “triplea” Folder.
