I just gave a friend my Creality Falcon 2 and he’s having problems linking it to Lightburn on his Mac. I had no connection issues with my PC. He’s using a usb-c to usb-c cable.
This is a screen shot of the device list on Lightburn. When we click on the device boxes on the Lightburn core 2.0.05, nothing happens.
Do not use usb-c cables. Use an older usb-a hub in between. Those Mainboards often have issues with usb-c, especially with Macs.
Check if the usbserial port is available. Add the laser manually, as grbl, as already mentioned.