We assume you already have Python 3 and brew available on your Mac. Thankfully, setup on MacOS X is not so bad!

Note: If you are running VMWare Fusion on MacOS, then you can also try the Windows install process.

Install libusb

Start by installing libusb with

brew install libusb

Install PySerial

Type pip3 install pyserial

Install hidapi

Type pip3 install hidapi

Install Blinka

Then pip3 install adafruit-blinka

Set Environment Variable 

You'll need to set this variable every time before running CircuitPython code. To do this, we set the environment variable BLINKA_U2IF.

You can set the variable by running:

Run the sanity checks.

Now move on to the Post Install Checks section and run the commands there to make sure everything is installed correctly.