Search for the driver package (WCH combines drivers for CH351, CH352, CH353, and CH355 into a unified installer).
MacOS dropped native parallel port support after 10.14 Mojave. However, the CH351Q can work with the open-source kext (not recommended for production). Most users find better results using a USB-to-parallel adapter or running Windows via Boot Camp. ch351q parallel port driver
Locate the setup executable (usually named CH35XDRV.EXE or SETUP.EXE ). Right-click the file and select . Click the INSTALL button on the driver utility window. Search for the driver package (WCH combines drivers
Like any software component, the CH351Q parallel port driver may encounter issues that require troubleshooting: ch351q parallel port driver