LiveCode can import HyperCard stacks. You'll need to use LiveCode version 6, since the HyperCard import functionality has been broken in LiveCode 7 onwards, but you can import a HyperCard stack using LiveCode 6, save the project in LiveCode's file format, and continue in a recent version of LiveCode.
HyperTalk and LiveCode aren't 100% compatible (probably around 80%, less if you used a lot of XCMDs since they aren't supported), but if you have an old stack you want to modernise, LiveCode is a great and affordable (it's GPLv3, with a commercial offering if you need to publish closed source projects) way to do it.
The best resource[1] on converting a HyperCard stack to LiveCode is by Jacqueline Landman Gay of HyperActive Software[2]. I believe HyperActive can also do consulting and conversion work for HyperCard stacks to LiveCode.
Oh man, I will have to try this. I have a TON of stacks that I made as a kid, would be fun to play around with them in a better environment than SheepShaver.
HyperTalk and LiveCode aren't 100% compatible (probably around 80%, less if you used a lot of XCMDs since they aren't supported), but if you have an old stack you want to modernise, LiveCode is a great and affordable (it's GPLv3, with a commercial offering if you need to publish closed source projects) way to do it.
The best resource[1] on converting a HyperCard stack to LiveCode is by Jacqueline Landman Gay of HyperActive Software[2]. I believe HyperActive can also do consulting and conversion work for HyperCard stacks to LiveCode.
[1] https://www.hyperactivesw.com/mctutorial/rrintro.html
[2] https://www.hyperactivesw.com/index.html