Member Since: Jul 17, 2009
Mac Specs: 27" i7 iMac, 24" iMac, 13" Macbook Air, iPhone 5 & 5S, iPod Nano 7th Gen, iPad 2 16GB WiFi, iPad 3
10-31-2012, 12:54 PM
You can try Keyboard Cleaner
, a program meant to allow you to clean your keyboard without having the keypresses do anything, but in your case you would run it all the time and then use the external keyboard..
There is another more drastic method
by removing the keyboard support from OS X itself.
I would recommend the app first and if that doesn't do it, then switching to the second method..
Be sure to read the Community Guidelines | The more information you provide, the better answers you get, remember GIGO.