Why always something is running at port 5000 on my mac

Question

I am a developer and I need to run my ruby app at port 5000, but always I try to run my app I get:

Address already in use - bind(2) (Errno::EADDRINUSE)

I know that the easiest way for solving this; is just change the port that I am using for running my app, but I want to know what happens, because every time I execute lsof -i tcp:5000 and kill the process, automatically a new process starts running in that port.

I am using a macbook pro with MacOs Monterrey with version 12.0.1

Answer 1

change the port number to 5001 and try

Answer 2

Goto System Settings > General > AirPlay Receiver > Disable AirPlay Receiver option.

Answer 3

This happens because Control Center on Monterey listening to port 5000 and port 7000.

For fixing this you need to turn off System Settings > General > AirDrop & Handoff > AirPlay Receiver.

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