How to Update Nanosaur II?

rbrtgraf wrote:

How to Update Nanosaur II? The developer has gone out of business.

Apparently there was a special agreement with that developer. You can download modern versions of Nanosaur II, as well as other popular apps from the day, like Bugdom and Ottomatic, from https://jorio.itch.io/

However, your question seems to indicate you are using macOS 10.12. These modern apps might not work on an old computer. I just fired up Bugdom on my 2021 M1 running Monterey and it works fine.

If the developer is out of business, you can’t update the app.