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Ports and dev servers on your Mac

Short, practical answers to the problems every Mac developer hits: with plain Terminal commands first, and the one-click way after.

“Port 3000 already in use” on Mac: how to fix itFix EADDRINUSE on macOS: find what holds port 3000, 5173 or 8000, stop it safely, or run on another port.
How to kill the process on a port on MacFree a port on macOS with lsof and kill, when to use kill -9, and how to stop services that keep coming back.
How to see every dev server and port on MacList every listening port on macOS with lsof, find the project behind each one, and why Activity Monitor can’t.
Port manager apps for Mac: lsof alternativesWays to see and stop dev servers on a Mac compared: lsof, kill-port, fkill, Raycast, LocalhostBar, PortKiller and Portlivo.

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