OS X Serial Driver Installation¶

Installation of the PL2303 and CH340 / CH341 / HL340 drivers is easy. Simple open the OS X installer and follow the steps.

Step 1 - Download Driver¶

Download the driver for your OS X version from the download dashboard:

Step 2 - Open Install Package¶

Step 3 - Start screen¶

Step 4 - Select install location¶

Default is most times the right choice.

Step 5 - Enter admin password¶

Step 6 - Driver has been installed¶

Step 7 - Check¶

When the driver has been installed, you can check if it has been loaded. To check, connect the serial device, open Terminal and type one of the following commands:

For PL2303 device: ls /dev/ | grep 2303
For CH341 device : ls /dev/ | grep ch341

The result should show the accompanying cu and tty handle.