CH340G CH34G CH34X Mac OS X driver
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Latest commit ffff327 Oct 19, 2016
adrianmihalko committed Oct 19, 2016 Merge pull request #4 from cotejp/patch-1
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CH34x_Install_V1.3.pkg 1.0 Sep 26, 2016 1.0 Sep 26, 2016 Update Oct 18, 2016
ReadMe.pdf 1.0 Sep 26, 2016


Latest macOS Sierra-compatible driver for devices using the CH340G, CH34G or CH34X chipset. This chipset is used in several Arduino-clones.


Version 1.3 (2016-09-27) of the OEM driver for the CH34x chipset currently causes a kernel panic (a.k.a. crash) when installed on macOS Sierra. To resolve this issue, please download and install the driver in this repo.


  • Remove the old driver by issuing one of the following commands (depending on your installation):
    • sudo rm -rf /System/Library/Extensions/usb.kext
    • sudo rm -rf /Library/Extensions/usbserial.kext
  • Restart your Mac.
  • Double-click on the CH34x_Install_V1.3.pkg file.
  • Restart your Mac.
  • Plug in your device. It should now be listed under the /dev directory. Examples:
  • /dev/cu.wchusbserial1410
  • /dev/cu.wchusbserial1420


If, and only if, the device is not recognized after the installation (or you cannot install the driver), please disable System Integrity Protection:

  • Reboot your Mac into Recovery Mode by restarting your computer and holding down Command+R until the Apple logo appears on screen.
  • Open the Terminal (Applications > Utilities > Terminal).
  • In the Terminal window, type in csrutil enable --without kext (or to fully disable: csrutil disable) and press Enter.
  • Restart your Mac.

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Adrian Mihalko

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