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)

If you are trying to get your game running on an older system, let me know:
Stardew Valley’s 1.6 update introduced major gameplay features, new festivals, and deep engine optimizations. However, this update shifted the game’s framework from .NET Framework 4.5.2 to .NET 6. This technical transition dropped native support for older 32-bit (x86) operating systems and older versions of macOS and Linux.
Steam provides access to the compatibility version through its built-in beta testing menu. Open the and locate Stardew Valley. Right-click the game title and select Properties . Click on the Betas tab in the left-hand menu. Locate the Beta Participation dropdown menu. stardew valley compatibility version download link
: Computers that cannot run 64-bit software.
Stardew Valley is beloved for its cozy farming, deep relationships, and constant updates. However, with the release of the massive 1.6 update, many players—particularly those on older hardware, Mac, Linux, or those relying on legacy mods—have faced performance issues or compatibility breaks. If you are trying to get your game
: Can resolve the "monobug"—a specific type of lag or crashing associated with the 64-bit Monogame update on certain hardware. Critical Limitations Stardew Valley Compatibility Guide
ConcernedApe has officially provided a beta branch for this purpose. To roll back your game, follow these instructions : Steam provides access to the compatibility version through
The game is designed to be compatible with a wide range of systems, but it's essential to download the version that matches your operating system.
Click on the Betas tab in the left-hand menu.
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.