Select and download a distribution pack appropriate for your OS from the website: https://cerebrohq.com/en/download (available for Mac OS/Windows/Linux).
Run the installation file and follow the instructions of setup wizard, or unpack the archive into a chosen directory.
Next, you have to log into Cerebro. Usually, your login and password are contained in a separate email message with “Your Cerebro Account” in its header. Later on you may change your credentials in the Cerebro/My profile… menu.