Port 5000 already in use? Simple solution is just use some other port instead of 5000 or else follow the below steps. * Open system preferences. * Then open Sharing. * Uncheck Airplay Receiver, as Airplay receiver is using that port. Run the server again!! * https://medium.com/pythonistas/port-5000-already-in-use-macos-monterey-issue-d86b02edd36c