I thought MacOS was supposed to have these drivers pre-installed. Did you install the drivers before you tried to connect?
I’d start by removing anything you installed. Restart the computer, and try to connect to the serial port (using something other than Easel).
I installed them only after both Easel and Candle would not talk to the CNC out of the box. I will try and remove them and start over.
I have some other older USB hardware (temp sensors & digital data collectors) that have similar issues on the Mac, but work fine on any new Windows laptop. I suspect there are some issues with the Mac USB ports working well with really old drivers that (I think) were originally old RS-232 serial drivers that were modified to work with modern USB ports.
Thanks Neil. This seems to be the same driver as on the Sainsmart site. I reinstalled it, seemed to install OK but the CNC still does not show up in the USB tree as it showed in the instruction PDF. Easel can’t see it either on any of the 4 USB ports.
I also uninstalled my Wacom tablet software on the odd chance it was mucking things up. It made no difference.
Kevin, I discovered the hard way that the presence of certain drivers (e.g. for a Wacom tablet) will prevent a Mac from communicating with the CNC applications. I think you have to remove whichever driver is at fault, not just turn it off.