Since none of the maintainers of the Proxmark github account runs OSX, we have hard times trying to fix OSX-related issues.
Is there someone in the community who can make an OSX vmware image? That would help out.
Hmmm, is OS X free software?
Not at all. Hence the call for help. Maybe there is someone on the forum who wants to help out and contribute with a license?
An alternative is to configure TravisCI to also build on OS X, like its been done with iceman fork.
This will only show when it breaks, but at least its better than nothing