How to find and kill a process running on a port in macOS

To find a process on a macOS El Capitan (10.15) and newer run the below command in Terminal

1

lsof -i tcp:<port_number>

eg: lsof -i tcp:5253

The lsof command will list all the process running on that port with their PIDs.

1
2

COMMAND   PID    USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
node    59925 abintom   23u  IPv6 0xe1a616838e9ee039      0t0  TCP *:5253 (LISTEN)

Kill the process using the below command where <PID> is the PID of the process which needs to be killed.

1

kill -9 <PID>

eg: kill -9 59925

Note: If the above command don’t work for normal user, use the command with sudo to run as admin.