Unable to setup machine

I have a shapeoko2 that I had setup and running beautifully 2 years ago. This weekend I decided to fire up the old beast and was prompted to install Easel driver 0.3.7. Done.
Prompted to setup machine. Entered machine details. Shapeoko1&2, Arduino & gshield, 500mmx500mm, M8 threaded rod, 24v DC spindle, confirm settings, and stuck…
Restart Mac, open chrome, go to easel, setup machine. Stuck again.
Check the forums. Reflash arduino. Followed the directions on this page to the T. https://inventables.desk.com/customer/en/portal/articles/2058884-how-do-i-re-flash-grbl-to-my-x-controller-arduino-
At the last step when clicking the arrow I get the error [chmod: Unable to change file mode on /private/var/folders…] its like 20 lines long and there’s no cut and paste.
Checked the forums again, cant find anything of the sort. Next steps please?

Macbook Pro Core 2 Duo P8600 2.4Ghz 4GB Ram
Mac OS 10.12.5
Chrome 58.0.3029.110
Only chrome was running. Arduino does powerup. Blue LED lights up. Plug in USB green LEDs light up. Also tried in Safari. No dice.

Maybe try to reflash the arduino with Inventables latest fork?
(try Firefox https://www.mozilla.org/en-US/firefox/ios/)
This is the extent of my knowledge. Others can chime in.
Call inventables and speak to @paulkaplan.