One of my Wacom tablets, an Intuos 3, has had a habit of freezing every so often, particularly when hovering. The cursor would simply stop moving till I clicked somewhere, usually a couple of times. Finally found a solution, in the one tablet setting I had never looked at.

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Open System Preferences > Wacom Tablet. Click Options (it may be located in a different spot than shown here).

 Wacom prefs

 

 

Change the Pen Button Mode to Click and Tap rather than Hover Click.

Screen Shot 2014-01-08 at 5.34.51 PM

Thanks to Adam at Fix KB for this solution.

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