Find (AND KILL) port 23515 Mac osx -

new here have learned tons on years , happen have pretty puzzling question. purchased product edit photos in adobe lightroom. called loupedeck. comes software , device controls parameters in lightroom (makes editing way quicker) once installed loupdeck software , opened lightroom got prompt.

"loupedeck needs access tcp ports 23515 , 23516. other process occupying 23515. loupedeck not work until application closed."

i have been searching days trying find app have installed thats using or used port 23515. have tried checking in terminal simple netstat command, , found nothing. i've used little snitch see if programs using port, still nothing. im little lost , sadly company lost , has no advice.

computer - macbook pro 2011 17" 2.3ghz osx 10.12.6

here error in lightroom

from this answer:

lsof -n -i4tcp:23515 lsof -n -i tcp:23515 | grep listen lsof -n -i:23515 | grep listen 

netstat may work:

netstat -ap tcp | grep -i "23515"  

any of these commands should give name , pid of process. once have pid, can kill process, or if know process name process_name can use killall -kill process_name .

just record though, terminal isn't running administrative shell default. in order execute commands in terminal administrator, have use command sudo su , enter password. once have prompt #, can try these commands again, sure.