bt ~ # ettercap -G
ettercap NG-0.7.3 copyright 2001-2004 ALoR & NaGA
ERROR : 2, No such file or directory
[ec_manuf.c:manuf_init:126]
Cannot open etter.finger.mac
bt ~ #
the actual fix for this problem is to look in etter.conf file located at /usr/local/etc/etter.conf and change the uid/gid from 65543 to 0 on both, and that will fix your problem