mac port in use code example
Example 1: kill all server 5000 mac
#First run this, to get port information (with the port you want to kill)
sudo lsof -i :3000
#Then run this, with <PID> replaced by the value in the column returned by previous command.
kill -9 <PID>
Example 2: running ports in mac
sudo lsof -PiTCP -sTCP:LISTEN
Example 3: 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