Great questions.  Thanks so much for helping here.  :)

---
TL:DR:
- I cannot read or write to the SD card on my computer after transferring 
the image to the SD card.  It's in a format the computer does not like (osx 
catalina).  Therefore, I do not know how to turn off the flash option in 
/boot/... to stop it from trying to reflash.
- I am not having luck figuring out how to access the image in u-boot over 
FTDI cable.
- I am using the current image from the download page.  I have also tried 
others, including the one called Flasher.  I could be messing this up 
somehow and under the delusion that it's working when it's not.
---

Longer explanation:

I am using the images found on the Getting Started page -> Download the 
latest ...
http://beagleboard.org/latest-images

On my mac (running Catalina) I use the following command to write the image 
to an sd card.
sudo gdd bs=1M if=bone-debian-9.9-lxqt-armhf-2019-08-03-4gb.img 
of=/dev/rdisk2s1 status=progress

I then eject the card place it in the BBGW and boot it.  It flashes over.

I remove the card and start the BBGW.  Watching the boot through the FTDI, 
I see it is trying to flash again.

I know about the setting in /boot//uEnv.txt

However, I cannot read the SD card on my computer once it's written the 
image from the gdd process above.  It gives me a warning when I plug it 
into my mac that asks me if I want to initialize, ignore or eject.  I have 
of course tried all 3.  In Disk Utility it doesn't even show up as a drive. 
 It doesn't show up using "df -h" and most importantly, it isn't showing as 
a drive where I can edit the uEnv.txt file and rem out the flash property.

Through the terminal I can hit space when I boot the board and go into 
u-boot.  I can view the environment variables but I can't figure out the 
commands to even see if the /boot dir is accessible.  I can't seem to find 
how to enumerate the "interfaces" in u-boot.  

I am going to bring the SD card to work and see if I can read the card 
there.  Also, I wonder if I should go a different route (different 
computer) to create the SD card to begin with.  I have seen some tutorials 
showing the manual formatting of the partitions, coping the image and 
making it bootable.  The suggested tool for the Mac has been not working 
for a couple of years and the developer isn't updating it.  So on my Mac, 
the (g)dd command is the only way.  

I will be trying to get my hands on a Windows PC tonight and see if I have 
better luck with the SD card there.

Thanks all for the help.  I know it's going to end up being one simple 
thing that I am missing.  At least the tinkering is fun.  :)

Michael B




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