How to get rid of the click sound (MAC)
Normal procedure to deactivate the click sound is to go to System PreferencesC-PEN Core settings and uncheck the Sound on checkbox.
See video for details.
If that for any reason fails, please go to LibraryInput Methods where you will find CPenCore.app (see this video about how to locate Library folder).
Open CPenCore.app‘s preferences and Show Package Content.
Delete the two (2) .wav files.
Reboot the computer.
See the video for details.