[MacOS] Port 8080 was already in use

찾기

lsof -i :포트번호

ex.
lsof -i :8080

COMMAND  PID     USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
node    1234 shaking   15u  IPv4 0x1f23462a48d69d65      0t0  TCP localhost:cslistener (LISTEN)

Kill 하기

kill -9 

ex.

kill -9 1234

출처: https://88240.tistory.com/475 [shaking blog:티스토리]