Once you've rebooted, you can (re)connect your FTDI
device and it will show up in /dev, usually like this:
/dev/tty.usbserial-XXXXXXXX
where XXXXXXXX is a random ID, based on the serial number.
To uninstall the driver, you must use the GUI to move the
application from /Applications/FTDIUSBSerialDextInstaller.app to Trash,
otherwise the system extension will not be removed.
You must reboot for the installation of ftdi-vcp-driver to take effect.