Is the Dexcom software compatible with a PC and a Mac?
Dex’s software is compatible with Windows only 
I was able to use it successfully with Bootcamp, but it was a huge pain in the butt.
I ended up getting a PC netbook (Black Friday deal!) that I’m using for all of my diabetes software (Dex, Omnipod, etc.). It’s working out well, and I can actually cart it along to my endo appointments!
PC only.
Or a Mac running BootCamp or Parallels. I’ve used it with both and prefer Parallels.
Terry