>Marathono is a small GUI tool that helps you manage long-running processes in macOS, so you don't have to maintain multiple windows/tabs/tmux sessions in your Terminal.
How about one tmux session and a couple of windows? You could name the windows perhaps. I could see how this might not scale, but I bet my socks someone else has found a way to script this and make it easy.
I know we don't want to be overly negative on HN, but this doesn't sound like a problem that needed a completely newly rolled solution.
So you have GUI output. What if I want to grep or save it to a file? I can see how this will be usable for people who aren't comfortable with a terminal--as a someone who transplated linux-to-mac, I know how terrible the terminal experience is on mac.
EDIT: below I was corrected that Marathono does all manipulating text output, +1.
There might be cases where I would find it useful but overall its usefulness is subjective and dependent on what you're looking for in your workflow/workspace.
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.
I wouldn't mind if this used launchd under the hood though.
Also, I have to disagree with the terminal experience on the mac being terrible. Between iTerm and brew, I've never come across anything I couldn't do, but that could be done on linux.
I mean, you are of course free to do what ever you want to do and have which ever workflow you feel comfortable with.