Before following the steps below, please take some time to read the generic tips for troubleshooting and asking questions from this post:
[Note2] If you are not the manufacturer of the device you are troubleshooting, note that Silicon Labs does not support end users directly. Please contact your product manufacturer for support. For more information, please see the following knowledge base article:
Following steps are considered as additional to information described from above. When you will post a question regarding VCP driver for Mac OS, please provide some information as below:
1) The SCH/Layout of your board if It is your custom design (eg: not Silicon Labs' EK).
2) The part number and the VID/PID of the part that you are using.
3) The output of the commands below (make sure your board is plugged in because the driver will not be loaded if there is no device attached to your system):
Get Mac Version: $ sw_vers
For Big Sur: $ systemextensionsctl list | grep -iE '(silabs|cp210x)'
For Older Mac OS (ex: Catalina): $ kextstat | grep -iE '(silabs|cp210x)'
List USB devices: $ ls /dev/cu.*
4) Your test code or scripts if any that you are using and have the issue with.