NXLog fail to start on macOS
Have you checked the NXLog's internal logs file. It has been set in the configuration file:
define LOGDIR %INSTALLDIR%/var/log/nxlog define MYLOGFILE %LOGDIR%/nxlog.log
Please check /opt/nxlog/var/log/nxlog/nxlog.log. There should be a clue ie. configuration problem, a sysntax error, permissions...
My best bet is the permissions. You are running the service as root manually...but the config file is set to run the service as the nxlog user: User nxlog Group nxlog