Setting up for TwoTrees

If it helps, I’m hitting the same issue. There doesn’t seem to be a usbmodem or usbserial port established, but the Mac does see the USB connection in System Profiler:

USB Serial:
  Product ID:	0x7523
  Vendor ID:	0x1a86
  Version:	81.31
  Speed:	Up to 12 Mb/s
  Location ID:	0x00100000 / 1
  Current Available (mA):	500
  Current Required (mA):	98
  Extra Operating Current (mA):	0

I think it may be the usb/serial chipset the TwoTrees laser boards use. It seems to be a common chip for arduino style dev boards. Digging into the usb vendor ID yields this thread:
Mac OS, Linux driver for CH340K · Issue #3 · LilyGO/LILYGO-T-OI · GitHub and this potential driver for the CH*** series usb serial chipsets: GitHub - WCHSoftGroup/ch34xser_macos: MacOS USB driver for USB to serial chip ch340, ch341, ch342, ch343, ch344, ch9101, ch9102, ch9103, etc

But… I must admit as I use this Mac for my business I’m not keen on being the test subject for taking a chance on a random driver :joy: