Well there was nothing mentioned in the official install docs about which version of Docker to use, so at first, yes I just installed the latest. Which was 3.x something… Rolled it back to the last 2.x version, and then after searching the forum some more, I found that thread. I’ve since installed 2.1.0.5 and everything has been smooth sailing for ~24 hours. 
I was migrating my nodes from a linux box to a Mac, and on the linux box everything “just worked” (haha) so I assumed on the Mac I could just install Docker and run with it. Bad assumption!
Might be a good idea to mention Docker version numbers in the setup documentation, @Alexey is that something you could look at?