Off topic, but I sincerely ask: am I the only one that is disturbed by the use of the term "Mac OS X" to refer to modern versions of the OS that is currently called "macOS"? (and not MacOS either)
I mean, the name was changed ten years ago...
It wasn’t even “Mac OS X” ten years ago, but “OS X”. “Mac OS X” was 15 years ago.
Looks like the submitter used the wrong term - the actual link uses "macOS".
But to answer the question: Yes! I opened thinking it was going to be some awesome Leopard or Lion app.
I miss the name, mostly because the OS was interesting and fun in those days and boring and dreary and buggy and low contrast and poor UX and squircles and flat colours if it even has colours now.