zlacker

>>jacque+(OP)
> Atkinson still uses HyperCard every day. His address book is a big HyperCard stack, and he has written a number of custom programs to help him with his photography and to maintain his website.

I wonder if he still does in 2020? Or if not, when did he stop?

>>Wowfun+lS3
SuperCard would be a kind of replacement:

https://supercard.us/index.html

>>lispm+214
Unfortunately, that one doesn't have 64-bit support (requires a full rewrite to get off of carbon). So no Catalina, but it is very impressive it works on Tiger through Mojave with no hitches! That's 10 versions of the OS.

>>jediea+Uk4
Just as an interesting technical note, MacDraw Retro is another one that supports Tiger through Mojave.

And of course, there's a lot of small programs that support the range as well, sometimes just by chance (a Tiger-era program just happens to work), but you're right it's rare for bigger, more-complex stuff.