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Thread: MacOs Sierra not recognizing Teensy 3.6

  1. #1
    Junior Member
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    MacOs Sierra not recognizing Teensy 3.6

    I recently purchased a new MacBook Pro 15" w/Touchbar running Sierra 10.12.2, Arduino 1.6.13, Teensyduino 1.35. I am using an Apple USB C to A adapter and plugging my Teensy 3.6 to it. Once plugged Arduino does not recognize it on any ports and the same is true for my teensy 3.2. Is there a driver that I am missing?

  2. #2
    I am running my Teensy 3.6 under OS X 10.12.2 and it is listed as "/dev/cu.usbmodem2430871". I am also using the USB C adapter as well.

    What do you see if you "ls -la /dev/cu*"?

    This is my output:
    crw-rw-rw- 1 root wheel 20, 1 Jan 13 11:00 /dev/cu.Bluetooth-Incoming-Port
    crw-rw-rw- 1 root wheel 20, 0x00000281 Jan 27 14:25 /dev/cu.usbmodem2430871

  3. #3
    Senior Member+ Theremingenieur's Avatar
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    Could you perhaps check with a different USB device, for example a mouse or keyboard, if that works with that USB C to A adapter? Normally, there is no reason that the Teensy would not be recognized. Special drivers should not be needed.

  4. #4
    Senior Member Davidelvig's Avatar
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    I'm on Sierra (Arduino 1.8.1, Teensyduino 1.35)
    3-year old MacBoo, with USB A sockets.
    It all works fine. I see "/dev/cu/usbmodem/943311 (Teensy)" as a second option (after my Bluetooth option)

  5. #5
    Senior Member+ KurtE's Avatar
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    Quote Originally Posted by lukicharms View Post
    I recently purchased a new MacBook Pro 15" w/Touchbar running Sierra 10.12.2, Arduino 1.6.13, Teensyduino 1.35. I am using an Apple USB C to A adapter and plugging my Teensy 3.6 to it. Once plugged Arduino does not recognize it on any ports and the same is true for my teensy 3.2. Is there a driver that I am missing?
    Is this a brand new Teensy? Never been programmed?

    If so did you follow the instructions given: https://www.pjrc.com/teensy/td_usage.html

    In particular plug in the Teensy. Then load a simple program like blink (examples->01.basics->blink)
    Then click the verify command button in the Arduino IDE. (Make sure the appropriate Teensy is selected as the device and USB->Serial selected)
    After the compiles completes and the Teensy Loader program loads.
    push the program button on the Teensy. Did it show it download program? And hopefully a new serial port object created.

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