> Setting a reasonable font-size on Retina requires a 3rd party plugin...
Thunderbird can handle high DPIs natively, at least on Linux. Hopefully OS X is similar. All fonts and UI elements are scaled up. Go to Edit > Preferences > Advanced > Config editor. Set layout.css.devPixelsPerPx to 2, or whatever looks good to you. It's the same procedure as Firefox.
Thunderbird can handle high DPIs natively, at least on Linux. Hopefully OS X is similar. All fonts and UI elements are scaled up. Go to Edit > Preferences > Advanced > Config editor. Set layout.css.devPixelsPerPx to 2, or whatever looks good to you. It's the same procedure as Firefox.