> So you have GUI output.
Which seems like it would be a Big Deal, for a Mac user. The entire appeal of the Mac (for a developer) is that it layers a friendly GUI over a Unix-ey foundation. Presumably a user who values that GUI would also value GUI-oriented ways to do things that were previously terminal-only.
If "just use screen" was an answer that would make that user happy, they wouldn't have spent the extra money to buy a Mac in the first place.