This person pointed me to it. https://blog.alexseifert.com/2020/06/09/emulating-mac-os-9-o...
The solution is a pre-made instance of SheepShaver running Mac OS 9.0.4 that includes a number of utilities and other pieces of software. The ROM is also included and the whole bundle is packaged into a simple, runnable application for macOS 10.10 and above. That means, all you have to do is download it, unzip it, move it to your Application folder and run it. Mac OS 9 boots right up and you don’t have to do a thing otherwise.
You can find and download this brilliant solution for free on http://www.columbia.edu/~em36/macos9osx.html.
Apple (SJ) apparently didn't know how many in-house applications people built with HyperCard. Some were classified. Others were just proprietary. I wrote XCMDs with CompileIt and HYPERBasic (try finding that one ) that did fun things like plotting, and converting graphics to PDF (as text files). It was fun and rewarding.
Discussions can be found below and elsewhere. https://news.ycombinator.com/item?id=30138533#30146989 https://apple.slashdot.org/story/01/03/30/0312203/trying-to-...
I haven't found a clone of HyperCard that suits my needs. Would be nice.