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)

occur when the skin's cooling channels become obstructed, trapping perspiration beneath the surface. This common condition leads to skin irritation, bumps, and discomfort, varying significantly depending on which type of sweat gland is affected. Types of Sweat Glands and Related Conditions
The symptoms often depend on which type of gland is affected and how deep the blockage occurs: Clogged sweat glands: Causes and symptoms - Vinmec blocked sweat glands
Pain levels range from 1/10 for mild cases to 9/10 for severe chronic conditions. occur when the skin's cooling channels become obstructed,
Apocrine glands are found in areas with high densities of hair follicles, such as the armpits and groin. They secrete a thicker fluid into the hair follicle rather than directly onto the skin. Apocrine glands are found in areas with high
: Choose lightweight, breathable fabrics like cotton or moisture-wicking athletic wear. Topical Care and Hygiene
Excessive heat and humidity can cause the body to over-produce sweat, overwhelming the ducts.
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.