Connect to X-RACER F303 with Cleanflight/Betaflight on OSX
By default Cleanflight is not able to identify the flight controller when plugged in with USB.
But you can install the USBtoUARTBridge driver from SiLabs, and it will be able to connect just fine, you can find it here: https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx#mac
And you will then be able to find your model as
/dev/cu.SLAB_USBtoUART in the menu: