Morse Runner is a Windows-based contest simulator developed by Alex Shovkoplyas, VE3NEA. Using Wineskin, it has been successfully and seamlessly run under OSX, and made available here for download. Sure, you could use Wineskin to do this yourself (and save me some bandwidth), or you can pull the ready-made dmg from here.
Running Catalina? Go to 'Download' to read the latest (and grab a box of tissues)

refers to a specific title on the platform. While the exact name of the work can change over time (due to title updates or region locking), the RJ code remains permanent.
Access specific story branches or endings without multiple playthroughs. 📂 How to Install RJ01171084 Save Data rj01171084 save
In technical contexts, "save" is a command that ensures the survival of digital content. For a user encountering the code rj01171084 , this might represent a unique identifier for a file, project, or dataset. Modern life relies on such systems: cloud storage, databases, and version control tools mitigate the risk of data loss. However, saving is not automatic. It requires awareness, discipline, and proactive measures. The failure to save rj01171084 could mean the irreversible erasure of critical work, underscoring the fragility of digital existence. As technology evolves, so does the responsibility to safeguard it. refers to a specific title on the platform
Confirmed working on: El Capitan, Mavericks, Sierra, High Sierra, & Mojave
MANY reports that it DOES NOT work on Catalina. It is very unlikely that it will work under Catalina in the near future, as it would require some pretty hefty development on Wine (they're working on it). The only other option I see is for some nice macOS developer to take the original code (it's open source!) and re-write it to run natively on 64bit macOS (go ask any developer, this is a lot of work). Since Xcode is now free if you're running Catalina, I'm happy to give it a try... when I can afford to buy a system that can run Catalina :)
If you have questions or comments about using this application under OSX, please email them to ki4stu k4iz at arrl dot net.