From ViewSonic Documentation
Troubleshooting
| Problem
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Solution
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| You install the UPDD driver and still cannot find the device.
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- Run console and view the error information.
- When the driver is installed you may see the following message:
- Ensure the software has been enabled, otherwise the driver will not be able to access any USB devices. This can be checked in: System Preferences > Security & Privacy > General.
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| You want to remove the setting files before installing a new version of UPDD.
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- Open a terminal window.
- Run the following commands:
- upddprocesses stop -c
- defaults delete com.touch-base. upddcommander
- upddprocesses start -c
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| The touch function is not working, and your MacBook cannot detect the touch screen anymore.
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- Please uninstall and reinstall the driver again.
- NOTE: The uninstall removes the system extension and the install installs the system extension again so that the user can “Allow” our software.
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