Scenario B – macOS Does Not Recognize the Device

If no prompt appears and the board is not listed in /dev/cu.*, follow the steps below to manually install the CP210x driver.

Follow the steps:

a) Download the Driver

• Go to: https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers
  

• Select the macOS version compatible with your system.
  

• Download the .dmg file.
  
  

b) Install the Driver

1. Open the .dmg file.

2. Launch the .pkg installer.

3. Follow the on-screen instructions:

• Click Continue
  
• Accept the license
  
• Click Install
  

4. Restart your Mac.

 

c) Allow System Extension (if blocked)

1. Go to System Settings → Privacy & Security

2. If you see a message like:

System software from developer ‘Silicon Labs’ was blocked

Click Allow

3. Restart again if requested.

 

d) Reconnect and Verify

1. Reconnect the Dev Chip Board.

2. Allow access if prompted.

3. Run:

ls /dev/cu.*

 Make sure /dev/cu.SLAB_USBtoUART appears.

4. Check in System Information → USB as well.

 

e) Final Step: Test with ChipInventor

1. Open ChipInventor → go to the Synthesis tab.

2. If all is working, you’ll see:

ChipLoader is Ready!