Everybody knows MacPorts, and there's Mactracker and MacCleanse on the App Store itself, and the infamous Mackeeper (which may very well be malware; Apple should go after them first) and companies: MacPhun and MacPaw.
But I guess people may confuse "Mac CLI" as being an official part of macOS.
Just anecdotal evidence.
Not sure what a better name would be, but it may need to be changed. I should add though, I had no illusions this wasn't an official apple offering.
In this case, I think the author of this tool has the most to lose, because he is building brand equity for someone else. If next year his tool takes off and he is forced to rename, he has to start over.
But let's assume this tool becomes so successful that he gets away with the "name hack", then it sets the wrong example for other aspiring toolmakers: "don't bother picking your own name, surf on on someone else's and if you succeed fast enough, you might get away with it". That is the same calculation which leads less scrupulous people like Comodo and OVH to "ask for forgiveness rather than permission". I think that is dangerous for innovation because it makes it less rewarding to try something new under your own name. Why bother if someone else will reap the rewards in the end?
The sooner you change, the better. Otherwise that is wasted brand equity for you. If you're going to work hard to build a great tool, the recognition for that should flow to a name of your own.
I'm really terrible at choosing names, so I'm sorry for criticizing more than I'm suggesting.
I wish you lots of success, the world needs more easy to use development tools. Don't let armchair quarterbacks like me demotivate you :)
Or shorten it to MacCli if you must.
The actual command doesn't have to change.
A good example of my ineptitude at identifying good names.
The great thing about open-source is that everything is created through collaborarion. The best of everyone is contributed to a project in benefit of the entire community.
What you have is a great, simple, direct name for a utility script. Better to ignore the trademark / brand FUD.