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.
Manually install Drivers on Windows. The following instructions are for Windows 7, Vista and 10. They are valid also for Windows XP, with small differences in the dialog windows. In the following instruction only the Leonardo board will be mentioned, but the same procedure is valid for all the Arduino boards.
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
Installation with Homebrew-Cask
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:
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Regards,
Adrian Mihalko www.mihalko.eu
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