There are very few pieces of software for the Mac. If all you want is logging, look at MacLogger: https://www.dogparksoftware.com/MacLoggerDX.html
Your options are:
1. An inexpensive Windows computer, possibly a used laptop that you can pickup for $200 from a surplus/offlease place. See if you like it, can get readjusted to the Windows OS, etc.
2. Install Windows (using BootCamp or Parallels) on your existing Mac. You will have some issues with Windows recognizing all your peripherals, but it's doable.
If you wold like to use the computer more extensively with ham radio, for example doing digital modes on HF, I would definitely recommend purchasing a separate Windows machine. You will get tired really soon trying to find work-arounds using your Mac.
The Yaesu FT-857D works great with computer software in general. You will have to be more specific in your question if you want more specific answers... what exactly would you like to accomplish? Bandscope only or full radio control and digital modes?