check port in use mac code example
Example 1: mac terminal find process by port
sudo lsof -i tcp:3000
Example 2: port finding in macos
$ lsof -nP -iTCP -sTCP:LISTEN | grep 8000
Example 3: running ports in mac
sudo lsof -PiTCP -sTCP:LISTEN
Example 4: 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