Touchscreen Driver
I have a late 2009 27" iMac. I am trying to connect a PCT2235 21.5" touch screen monitor using the displayport. It works except for the touch function. Can you help me with a driver?
iMac Line (2012 and Later)
Not likely, iMacs are not touch screen displays. If you are using some third party app to try and make your iMac a touch screen your question should be asked to the developers of that app. I have never (in 20 years of use) never heard of a touch screen Mac of any type.