Turn on your box with CE running.
As an example the IP of my box using CE is 192.168.8.128
Change the IP address in the example to your IP address of the box.
Using your Mac open the inbuilt application Terminal to SSH into your CE box.
To log in to the box you log in using the following command below replacing my ip with yours.
ssh root@192.168.8.128
You’ll be asked for a password in the terminal command screen.
Password is coreelec.
Now follow the commands given to you by ukmark62