Alexa is the intelligent application that connects your output home appliance with your device. Such as a speaker with the mobile. Now if you are not acquainted with, how to connect the Alexa app with your MAC device, then here is the procedure.

In the Alexa app, from the left navigation open the settings and update it.
After you have switched on the echo connect it with the device.
After punching the password, all you have to do is select connect.

For more information visit at:
Echo Alexa Customer Service