Every window opened generates a "The function ‘CGContextErase’ is obsolete" message in console my Mac is running OSX Yosemite 10.10.2.

I recently found out that in my console such messages:


  [A process name and its pid]: The function ‘CGContextErase’ is obsolete and will be removed in an upcoming update. Unfortunately, this application, or a library it uses, is using this obsolete function, and is thereby contributing to an overall degradation of system performance.


would occur for every window I opened.

I tried $ sample -e -wait [Application Name] then launch the application, but in the report I can't find any call to CGContextErase.

Is there anyway to reveal what is behind all this?

Following is a screenshot of Console messages filtered with word CGContextErase:



Update 1:

I ran EtreCheck and here is the result.

I also discovered that such problem will not persist in a newly created account.
I found the culprit. It was the outdated Tablet Driver from Wacom. After I uninstalled and upgraded it, there is no more such messages in console.