My windows 8 machine can talk to the board via USB with no problems. But when I try with my Macbook Pro or my Surface Pro (windows 10), neither can find the driver for the USB to serial chip. I can’t seem to be able to locate these drivers on the web. Does anyone have a link to a place where I can get them?
Try using this https://learn.sparkfun.com/tutorials/es … tup#CP2104 and see how that goes - be sure to install/run as admin 
That worked, thanks much