macOS 10.14 (Mojave) is the last macOS version to support 32-bit.
With macOS 10.15 (Catalina), Apple dropped 32-bit support by removing key elements needed for running 32bit apps (and plug-ins).
How can I keep using 32 Lives?
32 Lives would still work under macOS 10.7 (Lion) - 10.14 (Mojave).
Will 32 Lives ever be supported on Catalina (macOS 10.15)?
Currently it won't work. If we'll ever have a solution we will update this article.