Technical Issue Mac installation fatal error when running the command terminal

[MoonKnight]

Im trying to install MBII on my friend's mac and we've gotten to the 4th step in the Mac:Launcher/Mono Installation. We keep getting a fatal arror in the terminal after pasting the command.

 

[Puppytine]

Can't see nothing on your screenshot, it's too small.
Please reupload it.

 

[MoonKnight]

Here this should be better. Dank meme by the way