I was holding down a key (can't remember which) and then my keyboard and trackpad were no longer responsive. Multiple restarts, PRAM, and SMC resets did not do the trick.
I can use the keyboard and trackpad perfectly in my Windows partition (which I bootcamped) but can't seem to use it in my OS X partition or the recovery partition. It can however detect external keyboard and mouses. I have Googled endlessly for hours.
Anyone else experience this issue or have any suggestions?
I am desperate. I will travel to Alaska and hit option 5 times at this point.
Best Answer
This sounds like the kext that controls the built in keyboard / mouse is either missing or damaged. I believe the kext in question is something along the lines of "IOUSBFamily.kext". I doubt this would be a hardware/firmware issue though since Windows recognizes input from the built in keyboard/trackpad.
You might try repairing the disk using Disk Utility in the recovery volume and then repairing permissions using Disk Utility while booted to your Macintosh HD volume.
If those don't resolve the issue then I would attempt an archive & install of the OS...
This process SHOULD preserve your data but as always it's a good idea to have a backup of any pertinent data beforehand. The reinstallation will go through and reinstall the base system files, which should include the missing/damage kext responsible for the problem, while leaving any files you've added alone.
Hopefully all goes smoothly and that fixes it for you!