Currently, serial cameras do not work on MacOS. This is because the logic used to determine if a camera is a serial camera is incomplete:

• On Windows, we look for the prefix COM followed by a non-zero integer
• On Linux, we similarly look for the prefix /dev/ttyACM followed by a non-zero integer

On MacOS, serial devices show up as /dev/tty.usbmodem followed by a non-zero integer.