Maxwell on OSX uses "Lucida Grande Regular" as font for all applications (it's installed by default with the OS). Maybe you did something strange with the fonts in your system like changing names, deleting, or simply it got corrupted.
And back again the fonts get corrupted. I did not install any new fonts nor deactivated old ones. I didn't install any updates. All other applications work fine. This bug affects only all Maxwell applications. Any chance to track down this bug?
There should be something specific to Maxwell applications. The rest of the system works just fine. And I can't reboot each time something happens to its fonts.