- 99% chance it's a USB cable problem.
- If you're a manufacturer, blah blah major and minor device numbers
Looking for this device;
Do you have the driver software installed?
- find /Library/Extensions/SiLabsUSBDriver.kext
Is the driver loaded?
- kextstat | grep -i silabs
Loadin the driver:
- sudo kextload /Library/Extensions/SiLabsUSBDriver.kext
This does something:
- ioreg -p IOUSB -l
watch console.app and plug device in.