Thanks, but that didn't work, despite programming on the main. Unfortunately, I have had no success getting a serial cable to work, so I am still unable to run JMRI. And, I don't have a LokProgrammer, although I heard they aren't compatible with a Mac anyway (I hope I'm wrong). 
DFF
Dave,
If you haven't already, you could consider joining the NCE group on groups.io. They just migrated from Yahoo Groups. There a fellow there by the name of Dave Heap. He writes the ESU stuff for JMRI, is an NCE & Mac user. I think all you really need to do is buy a supported USB-Serial cable, but I'm all Digitrax and I don't know the ins and outs of serial interface to NCE. Mr. Heap does as do others on that list.
It sounds like you got an off brand USB-serial cable, in the other thread I think you said Walmart? In any case the most compatible cables have the FTDI serial chip. Just make sure you get a legitimate one, there are cables with illegal copies/knock offs that don't work. The last few versions of macOS (or OS X) have drivers built in so you won't have to load any. Also built in are drivers for the Prolific PL2303series.
The address for the NCE group is:
https://groups.io/g/NCE-DCCAs for the LokProgrammer, yes, you need either a Windows machine or on your Mac you can run Windows via Bootcamp or an emulator such as VMWare Fusion, Parallels or Oracle VirtualBox. Dave Heap uses either Fusion or Parallels, I can't remember which. I use VirtualBox. All work. VirtualBox is free to non commercial users such as hobbyists. Unfortunately all require the purchase of a Windows license, 7, 8 or 10 will do. I prefer 7, but those are getting hard to find legitimate copies. The emulators have the advantage over Bootcamp in that you don't have to reboot your system to run and you can use both Mac and Windows at the same time. They have the disavantage that it takes a somewhat higher horsepower system and more memory to do so. But a recent (less than 4 or 5 year old) laptop or iMac will suffice and 8GB of memory is adequate.
And, I guess you can ignore most of the previous. I just saw the post where you said you had gotten JMRI working.
