Trackpad is sometimes not working on MBP after OS X 10.8.2 upgrade

You're not speaking to Apple here. We're all simply "users" like you, so I'd suggest you call Apple tech support or go to an Apple Store, if there's one near you.

Sandra, I am aware of that... I have found the following regarding this issue: In my deep despair, I have connected a wired mouse (feeling reeeally strange with that, since I use gestures a LOT)... I begin to work that way a few minutes ago, and tired of the mouse, I have tried to use the trackpad (not expecting much) with the mouse connected to the usb port and the trackpad is now working as expected. I don't wan't to understand this, as this seems very odd, but it worked for me!

Is not a proper solution, but it is best than waiting for a fix, or downgrading...

Try this (suggested by an Apple Centre about another keyboard etc. problem): Remove the batteries, count to 10, re-insert, switch on the device.

Wireless problems are witchcraft, not logic or engineering.

I have the same problem on a mid 2012 Macbook Pro.

I also have been running to this issue since updating to 10.8.2. Keyboard and Trackpad on board the MBP (Early 2011) as well as the wireless BT Apple keyboard and trackpad have issues. Anyone found any solutions?

Finally got it fixed. Make sure you guys call Apple Support. The first tier tech support is not able to help you because they have not been trained for that 🙂 You will have to speak to a senior advisor. There will be a lot of deleting of caches involved while in safe mode. After did all that my trackpad and keyboard is working again. Hope you'll get yours working too!

Why dont you share with everyone 'how' you fixed it?

Umm I thought I just told you guys. There are a lot of folders and caches that need to be deleted, while in safe mode. There is no way I can remember all of them and their location, as I was not able to write down the step-by-step while I was on the phone with Apple Support. As I said, a senior advisor helped me. The first tier support was not able to.

I followed your directions and called Apple Support. WARNING! You must still have AppleCare for them to help you. As I am an early adopter, this no longer applied to me.

Best bet seems to make an appointment with the genius bar. Unless someone can come up with a step by step.

So for those who do not have Apple Care, then the Genius bar is your best bet.

Last night I made a Factory Reset with CMD+R, It downgraded to Lion as I bought. The problem persist.

Last night I made a Factory Reset with CMD+R, It downgraded it to Lion as I bought. The problem persist.

I was able to solve this problem by moving all files under /Library/LaunchAgents/* and /Library/LaunchDemons/* /Library/StartupItems/* to the Desktop and then rebooting.

The problem went away. So obviously one of those files together with 10.8.2 is causing this problem.

Now I just need to add those files back one at a time (rebooting in between everytime) to see which file actually causes the problem.

I hope this info is of any use to you.

/K

Actually some of those files/folders are the one that needed to be deleted.