Unlike Windows, macOS doesn't always automatically recognize legacy USB-COM devices. However, with the right driver configuration, you can have that CRD-20 scanning into your POS software within minutes.
You should see a device named something like /dev/tty.SLAB_USBtoUART or /dev/tty.usbserial . Zebex Crd-20 Driver For Mac
Disclaimer: Always ensure you have a Time Machine backup before installing Kernel Extensions on macOS. Disclaimer: Always ensure you have a Time Machine
If you are a hobbyist or a small shop with one Mac, go for it. The driver fix takes 5 minutes. However: If you run a high-volume retail store with 5+ Macs, consider upgrading to a Zebex Z-6170 or a Socket Mobile S700 . They are native "USB-C" and "Plug-and-Play" on macOS without these driver headaches. However: If you run a high-volume retail store
Open Finder > Applications > Utilities > Terminal . Run: sudo rm -rf /Library/Extensions/SiLabsUSBDriver.kext (if it exists).
However, if you are still trying to use the from 2012—it will not run. You cannot configure the CRD-20 via a GUI on modern Macs. You must use the physical barcode configuration sheet. Final Verdict: Should you upgrade? The CRD-20 is a beast of a scanner. The build quality is superior to most $50 Amazon specials. But on macOS, it is a legacy device.