I've some fonts in different weights (thin, regular, bold etc.) that work regularly for example with Libreoffice on Linux Debian. The menu offers me the possibility to choose the desired weight.
Installed with Librofont on a MacBook, the fonts instead show the generic family name and I don't have the possibility to choose the weight. Is there a trick to solve the problem? Or have I to change some parameters in the font names (for example "preferred family") within the font itself?