I using Lightburn 9.09 with a cheap A5 diode laser (with arduino nano controller) When i want to select the right serial port I only see “cu.usbserial1420” (number is reference to port), this used to be all serial ports. I suspect that the serial ports are filtered now, for controlling the A5 laser I normally should select “cu.wchusbserial1420”.
I can still select “cu.wchusbserial1420” in the arduino IDE and give commands like “$$” there, but I can’t select this port in Lightburn any more (and no longer control the A5 laser).
I rolled back to 9.07 and the port “cu.wchusbserial1420” is available there.
I use OSX version 10.14.6 Mojave
Laser controller : Arduino nano (clone) with Grbl 1.1f firmware
More technical data, the arduino has a CH340 chip with an driver you have to install manually. Driver can be found on http://www.wch.cn/download/CH341SER_MAC_ZIP.html
(sorry for the repost I accidentally remove the first one.)