I'm experiencing a similar problem that others do (MBA 13", 2011). However none of the possible fixes got me closer, so I tried to narrow down where the real reason for this could be. When I bought it (August 2011), it did a 100 day uptime, straight out of the box. Then, out of a sudden, a trackpad & keyboard freeze while watching flash video. It was hard to reproduce, but I was sure that it happens after the Macbook was put to sleep, and then woken up, and having flash content in a browser. So I figured that it's a software problem. It went away sometime mid-2012, and so I wasn't bothered about it. I updated to Mavericks when it came out. A bit later, maybe after a software update, it started happening again. And recently it's getting pretty severe: the keyboard and the trackpad freezes. Power button works. External mouse usually works. The keyboard and the mouse doesn't show up in the USB devices tab, System Preferences says "No trackpad", the Bluetooth icon sometimes shows it's broken. (usually when the external mouse fails as well) Restart sometimes solves it, sometimes it goes into a boot loop (keeps playing the "ding" with a white screen), sometimes it gets to the login screen with the keyboard and trackpad still frozen. SMC & PRAM reset solves it temporarily, that is, I can log in eventually, if I don't just restart, but go through the reset procedures. Things I tried and didn't help: delete 3rd party kernel extensions related to USB deleting all the login stuff that was mentioned in related threads turning off bluetooth turning off keyboard backlight SMC reset PRAM reset delete caches with OnyX fresh start (never putting it to sleep) fresh start and battery only (to cross off power supply fault) turning off active sleep no flash content only using Firefox OR Safari OR Chrome all of these at the same time Things that should cause it, but never do: heavy CPU load seemingly has no effect by itself heavy GPU load seemingly has no effect by itself Things that make it happen sooner (anecdotal, have no hard data on it): flash video after wake up utorrent client downloading at 3+ MB/s external monitor plugged in all these combined I could post error logs, but it's always different and USB related: checksum error, fatal error, USB stuff. All the error messages I encountered have been encountered by others, that's how I found the possible (but ineffective) fixes. It is really annoying, and I'm not looking to waste money on an off-warranty logic board replacement, as I'm not sure that would solve it (it didn't work for others). Can it be a ribbon cable? Can it be a software problem? It is really annoying, and seeing all the attention 13" Retina MacBook Pro users got after experiencing similar issues (and also an SMC update), I'm hoping that there's a verifiable problem here that can be fixed in a less drastic way.