Ion Client Command Line

Hey all, I've got a question with a likely obvious answer.

I'm running my MacBook Pro as a client, connected to our Ion via ethernet. Network connections are fine, it establishes the connection, I can see everything I need to on the screen, open up tabs, etc.

What I can't seem to do is use the command line at any point. I'm trying to set this laptop up so lighting designers can sit in the house during tech and make changes as needed without relaying them to the (most likely inexperienced student) board op.

I've used the client in this way once previously a few weeks ago when I first got the dongle, and don't think I've changed anything. Any ideas?

Thanks.

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