Mac OS | Find and Stop a Port in Use

Search for a Port

Enter the port number as shown below and search for the process.

lsof -i :{port number}

When you actually search, the output appears as follows.

% lsof -i :8090
COMMAND   PID  USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java    62421 kimkc  409u  IPv6 0x891847b9306c0d75      0t0  TCP *:8090 (LISTEN)

Stop the Process Using the Port

Then enter the process ID (PID) and terminate the process.

kill -9 {PID}

The process ID (PID) found above is 62421. Run the command as follows to stop the process.

% kill -9 62421