点击查看教程(CH34X_DRV_INSTALL_INSTRUCTIONS).pdf

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1 Nanjing Qinheng Microelectronics Co., Ltd. CH34X USB-to-SERIAL MACOS DRIVER INSTALLATION INSTRUCTIONS Introduction Version: V1.6 This installation guide document shows the procedure of installing the macOS driver for the WCH USB-to-SERIAL devices. The driver can be downloaded from the website: Link: http://www.wch.cn/downloads/CH34XSER_MAC_ZIP.html System Requirement  OS X 10.9 to OS X 10.15  OS X 11.0(Big Sur) and above Chip Model Support  CH340/CH341/CH343/CH9101/CH9102/CH9143 (USB to Single Serial Port)  CH342/CH344/CH9103 (USB to Multi Serial Ports) Installation 1. Download the driver from the website and unzip the file to a local installation directory. 2. Click on the driver file and continue to proceed step by step.

2 Nanjing Qinheng Microelectronics Co., Ltd. When using OS X 11.0 and above, you need to perform the following additional operation: Open “LaunchPad” and find “CH34xVCPDriver” Application, open the App and click the “Install” button.

3 Nanjing Qinheng Microelectronics Co., Ltd. When using OS X 10.9 to OS X 10.15, you need to click “Restart” to restart your computer, then perform the following steps after restarting. 3. When plug the USB-to-SERIAL device into the USB port, you can open “System Report”->Hardware->USB, the right side is “USB Device Tree” and you will find a device whose “Vendor ID” is [0x1a86] if USB device is working properly. 4. Open “Terminal” program under Applications-Utilities folder and type the command “ls /dev/tty*”. You should see the “tty.wchusbserialx” where “x” is the assigned device number similar to Windows COM port assignment.

Note: 4 Nanjing Qinheng Microelectronics Co., Ltd. macOS High Sierra 10.13 introduces a new feature that requires user’s approval before loading new third-party kernel extensions. Link: https://developer.apple.com/library/content/technotes/tn2459/_index.html Please forward to “System Preferences”->“Security & Privacy”->“General” page, below the title “Allow apps downloaded from:” choose the choice 2->“Mac App Store and identified developers” so that driver will work normally. Uninstall Driver  OS X 10.9~10.15 Open “Terminal” program under Applications-Utilities folder and type the following commands: sudo rm -rf /Library/Extensions/CH34xVCPDriver.kext sudo rm –rf /var/db/receipts/*CH34xVCPDriver*.*  OS X 11.0 and above 1.Remove the Application to “Trash” to uninstall. 2.Restart the computer before reinstalling the driver.

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