Aug 07, 2017  I have several low-cost development boards that use the CH340/CH341 usb-to-serial chip for usb communication. Unfortunately, with OSX Sierra, the official CH340 driver cause a Kernel Panic (freeze + reboot) of the Mac when a device is connected. The reason is that the drivers.

. Updated Nov, 2017 with the latest driver for OS-X High Sierra. Updated Oct, 2016 with the new signed driver for OS-X Sierra. Updated Nov 22, 2015 with the new signed driver for OS-X El Capitan and Yosemite. Updated Jan 9, 2016 with Windows DriversMy golden rule is that if something took me longer than 15 minutes to figure out, then it's worth documenting in a tiny blog post so that it would save time to others, just like many other similar posts saved me million hours by providing simple clear instructions.

Introduction – What Is CH340G? Recent versions of cheap Chinese have been coming with a different USB/Serial chip, which replaces the usual FTDI. I read somewhere that licensing costs of FTDI make it prohibitive to companies selling boards for as little as $3, so I assume this is the main motivation. To be honest, as long as I can talk to my Arduino and buy it for $3 a piece, who cares?:)Below you'll find links to drivers for both Windows and Mac to make these work. Please leave a comment, if it worked or didn't work for you, especially if you had to do anything special or hacky to make it work:) WindowsA fully signed drivers for Windows can be found below:.Mac OS-X High Sierra(Added: November, 2017)Looks like the updated version from their site works now as is. Here is the updated cached locally, but for other platforms, please checkout.

Sierra(Added: October, 2016)The Version 1.3 of the driver available on the vendor's website causes a crash on Mac OS-X Sierra. Thankfully, patched the driver, and made it available to the public. The updated and patched Sierra Mac Driver can be downloaded here —.

Thanks to for posting the driver.Inside the driver is a brief README with the following instructions:Driver READMECH34X USB-SERIAL DRIVER INSTALLATION INSTRUCTIONS Version: V1.0 Copyright (C) Jiangsu Qinheng Co., Ltd. Pre-InstallationNote: the following pre-installation steps are only required on the two most recent versions of OS-X Yosemite and El Capitan. It is because the driver is not signed properly from Apple's perspective. We are waiting on the developer to update the driver so that these pre-installation steps are no longer needed. OS-X El Capitan Steps (Only For The Older Driver!)These are not needed for the newer driver above. Reboot and press ⌘-R immediately after the chime to enter Recovery Mode. Open Terminal from the recovery mode.

Had Turkey emerged victorious or not taken up arms, the Ottoman Empire would not have been partitioned, and the Sykes-Picot carve-up, which has given the Middle East some of its most troubled borders, would not have taken place - at least not then.In addition, with the exception of the Maghreb and Egypt, French and British influence in the Middle East would have been negligible. Ottoman empire alternate history. World War I Through Arab Eyes - Episode two: The OttomansAnd given how the current regional (dis)order depends on the events of a century ago, charting alternative realities can help illuminate our contemporary situation.No partitionIt is far easier to speculate about what would not have occurred.

run the command csrutil enable -without kext. Reboot.

See if you wish to know more details. Installation. Download the driver from here:.

Double click the ZIP file do unzip it. Open the folder /Downloads/CH341SERMAC. Run installer found in that folder. Restart when asked.UsageIf the driver properly loaded, you should see the device in you /dev folder (this is for advanced command-line users of OSX only). On my machine it was called /dev/cu.wchusbserial1441140This port is showing up correctly in Arduino 1.0.6 and Arduino 1.5.8.However, if you are using the Eclipse Plugin, it is not smart enough to list this port in the list of available serial ports (either in project properties, or in the serial monitor). You will have to type the entire thing yourself: /dev/cu.wchusbserial1441140 and then Eclipse can upload your sketch.That's it! You should be ready to use the drivers and the board.

Latest macOS Sierra/High Sierra-compatible driver for devices using the CH340G, CH34G or CH34X chipset. This chipset is used in several Arduino-compatible clones and serial-to-USB cables.

Do not install if you have the current macOS Mojave 10.14 or later. macOS Mojave 10.14 (released in October 2018) includes a CH34x driver by Apple. If both Apple's and the OEM driver are installed, they will create conflicting non-functional serial ports. Steps 1 to 3 below can be useful to remove the conflicting OEM drivers.

If you use Apple's driver and have problems with the serial communication, ensure the data rate is 460,800 bps or lower.

Introduction

Version 1.5 (2018-07-05) of the OEM driver for the CH34x chipset.

Version 1.4 (2017-01-11) of the OEM driver for the CH34x chipset.

Version 1.3 (2016-09-27) of the OEM driver causes a kernel panic (a.k.a. crash) when installed on macOS Sierra.

Installation

1. Unplug any CH34* devices.
2. Unload the old drivers if running:
   • sudo kextunload /Library/Extensions/usbserial.kext
   • sudo kextunload /System/Library/Extensions/usb.kext
3. 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
4. Double-click on the CH34x_Install_V1.5.pkg file and install (no need to reboot)
5. Instead of rebooting, you can force quit Installer after it completes.
6. Load the new driver:
   • sudo kextload /Library/Extensions/usbserial.kext
7. Plug in your device. It should now be listed under the /dev directory. Examples:
   • /dev/cu.wchusbserial1410
   • /dev/tty.wchusbserial14210 (driver version 1.5)

Installation with Homebrew-Cask

• Install the driver by the following commands:
  • brew tap adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver https://github.com/adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver
  • brew cask install wch-ch34x-usb-serial-driver

Troubleshooting

If the device doesn't show up under /dev, check the section 'Security and Privacy' in System Preferences for any notices about blocked software.

Note: disabling System Integrity Protection is no longer necessary, as the current drivers are properly signed by the OEM. If you're having problems, they're almost certainly not related to SIP. The instructions below are left only for reference purposes. If you had previously disabled it (especially if you did so completely), you are strongly encouraged to fully re-enable SIP.

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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Regards,
Adrian Mihalko
www.mihalko.eu

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