I cannot start rabbitmq on my mac

Here are a few commands to get you started. Just open your cli and type from anywhere

brew services start rabbitmq     //start 
brew services stop  rabbitmq     //stop

brew services restart rabbitmq   //restart 

You can also list all the running services by

brew services list

Alternative way -

Go to the directory where rabbitMQ is installed and run following commands

cd rabbitmq_server-3.5.3/      //check you's version 
sbin/rabbitmq-server           //start server 

sbin/rabbitmqctl shutdown      //stop server 

You should be able to run /usr/local/sbin/rabbitmq-server or use brew services start rabbitmq