https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/

Follow the installation steps end-up with "mongodb Error: couldn't connect to server 127.0.0.1:27017" when run the command "mongo"

Command "brew services start mongodb-community@4.4" status stated service is started, but actually service is not started and nothing in mongodb.log file.

And so many have the same issue and asking all over the internet, but no answer from mongoDB team, left everybody like a headless chicken.