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That's because the Mac OS X FTDI drivers that FTDI provides are absofuckinglutely terrible. Don't install them, use libusb from userspace...

• duskwuff 13y ago
  Or use the less-buggy FTDI drivers that are provided by Apple in Mac OS X 10.9. The vendor drivers are no longer needed.
  • X-Istence 13y ago
    Did not know that Apple provided drivers, finally! I haven't played with an FTDI in a while!