First up - big thank you to Carbide support, esp @Jorge and @WillAdams for bearing with me and helping to troubleshoot the problem.
From what i can tell the main problem is with my Mac laptop - for whatever reason it is creating the Serial Port Permission error. I have tried repairing permissions on the HHD to no effect - so that’s a deeper dive into serial port permissions, or maybe updating my OS or … ?
Coupled with this i tried to use a Dell Inspirion laptop circa 2013 to connect and run the Shapeoko. While it connected it did not run the software properly.
So i had two computers both exhibiting different problems with the same outcome - a Shapeoko that didn’t seem to work. Which led me and, i think, the Carbide support team to assume it was hardware related.
But the faulty logic seems to be that i did not use a third or fourth computer to attempt to connect and run the machine - and rule out that the first two laptops were good or bad.
in a moment of clear headedness i used a Mac laptop circa 2009, installed CM and it worked fine, now i have a mac mini attached to it - it’s milled a job in pink foam - and today i’m going to try to figure out a flip mill operation and also test the full 33 x 33 area.
Whew. i was really starting to lose it for a while.
fingers crossed for the flip milling.