All you need to do to initiate an SSH connection in Mac OS is start your Terminal and execute the following command:

user@localhost: ssh USER@HOST_NAME -pPORT

- USER - the user for which you want to establish the SSH connection. If your account is hosted by SiteGround, this will be the same username as the one you use to log in to your cPanel.

- HOST_NAME (or IP address) - here you should enter the host/IP of the server to which you wish to connect;

- PORT - the port for the connection;

Press "Enter" and you will be asked for the password for USER. Type the password and press "Enter" again. You will be successfully logged in.

SiteGround customers can find more information on how to use SSH with their accounts at the links below:

How to log in to my Cloud hosting/VDS via SSH in Mac OS?

How to log in to my dedicated server via SSH in Mac OS?

How to log in to my SiteGround shared account via SSH in Mac OS?