SHELL

list used ports on mac

sudo lsof -PiTCP -sTCP:LISTEN

COMMAND     PID      USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
GitHub      850 grgarside   6u   IPv4 0x23c345381d089301      0t0  TCP localhost:25035 (LISTEN)

running ports in mac

sudo lsof -PiTCP -sTCP:LISTEN

mac list used port

sudo lsof -i -P | grep LISTEN

check all the ports in use mac

$ npx kill-port 3000 8080 8081

Process on port 3000 killed
Process on port 8080 killed
Process on port 8081 killed

ways to identify ports in use on Mac

sudo lsof -i -n -P | grep TCP

mac list used port

sudo lsof -nP -i4TCP:$PORT | grep LISTEN

mac list used port

sudo lsof -nP -iTCP:$PORT | grep LISTEN
sudo lsof -nP -i:$PORT | grep LISTEN