@illidian There have been no changes to Alfred's font rendering or themes (including font weight) in 3.7.1.   I've taken a look at this and it seems that this is a Mojave specific issue based on whether the main window has a transparent background or not. Alfred sets the window background to a special Apple "clear colour" so that the rendering can be done completely by itself. If I set the background to be black with an alpha value of 0.0001 (so basically invisible but not clear), the