Rated 1 out of 5 stars

Mac OS 10.13.6 / Export im PDF-Format funtioniert nicht:

Wegen eines Fehlers in Thunderbird ist diese Funktion bei diesem Betriebssystem nicht verfügbar.

This review is for a previous version of the add-on (4.0.4). 

happy New Year's, sorry for the delayed response.
Currently there is a Thunderbird bug regarding PDF output on OS X. The original as well as NG disable PDF output for that reason on OS X. I am aware of the problem but no solution yet, stay posted.
Christopher