Keyboard lockups with OSX 10.8.2

YES. Similar issue on iMac with USB keyboard/numeric keypad.

See my new post.

Same problem with the keyboard. Trackpad not responsive either.

My external keyboard no longer works on my retina mbp, nor does my wacom tablet.

Same here; Magic Mouse, Keyboard and trackpad keep hanging and loosing bluetooth connections since I upgraded to 10.8.2 (Macbook Air 13in 2012)

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

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've been following this discussion due to keyboard problem after update to 10.8.2.

Using original USB keyboard (MB110LL/A) with keypad supplied with 2008 iMac.

Problem: number keys (only on the keypad) fail after login, after updating to 10.8.2. Keypad numbers work as usual when entering system password at startup.

Solution: tested keyboard at Apple Store & it works fine on their 10.8 demo machines. Purchased new keyboard to try (MB110LL/B), & that solves problem. After 4+ years, original needed retirement anyway.

Refer to "Difference between MB110LL/A and MB110LL/B" discussion in Apple Store,

http://store.apple.com/us/product/MB110LL/B/apple-keyboard-with-numeric-keypad?f node=56

Time will tell if others with older iMacs encounter the same problem.

Can't find an Apple Knowledge Base article on Cache Cleaning, so I tried OnyX for Lion, b/4 upgrading to Mountain Lion.

Worked great. It's not on App Store--so I downloaded from CNET, also found it on MacUpdate.

MtnLion worked much better than Lion on my older iMac until I updated to 10.8.2. Then it started to bog down again, so I looked up OnyX again.

There is a new version of OnyX for MtnLion (2.6.1), also versions for all previous OS X flavors. Tried the new one, and again it helped. Don't know why they aren't on the App Store but I've never had a problem with downloads from CNET.

It works fine and there are decent advice & help menus. They don't bug you for donations. I had to hunt for the developers website, http://www.titanium.free.fr to find a donate link.

I'm will wait for feedback about future OS X updates.

This worked for me:

I removed the contents of these folders and restarted. Nothing in there I couldnt live without.

/Library/LaunchAgents/*

/Library/LaunchDemons/*

/Library/StartupItems/*

See here for possible fix: https://discussions.apple.com/thread/4315898?answerId=19702976022#19702976022