RP Infinite

by Konlet
Create the unreal and live in another world.
So i went on the internet to make sure i was entering the code on the Mac version of the command line. I went to the terminal, which is what it is called, and I copied and pasted the code and it just says:
-bash: Dreamdownload: command not found
I also typed it in myself and the same thing happened. Does anyone know what I should do?
Byond doesn't support mac.