I made a little video for the Apple peeps to perhaps see (and anyone else here). Would be interested to know if this is the same thing that is happening to you?
http://youtu.be/WyfQuQoGgRo
First of all, I am having this problem on an 13” MacBook Pro purchased May 2011, not the new Haswell model referred to in this forum topic, but I’m inclined to believe it to be the exact same issue, read on:-
Just as mentioned by others here: This has been happening the past month, since I updated to Mavericks. I’m 90% sure this is Mavericks related though there is always a possibility it is something else.
Just as mentioned by others here: There is no problem if I am using an external USB keyboard (my usual situation). This only happens when using the laptop without a USB keyboard.
My system spec:
Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro8,1
Processor Name: Intel Core i7
Processor Speed: 2.7 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 16 GB
Boot ROM Version: MBP81.0047.B27
SMC Version (system): 1.68f99
Other things to note are that I’ve also discovered I can “encourage” this to happen if I pause typing for a second or two (see the video). Doing this I can have the lag happen every 20 seconds, of course this makes the laptop pretty much useless.
I shot this video whilst in a coffee shop today, hence I removed the sound and cropped off other bits. I actually spent a good hour closing running apps to see if I could find out if it was an app causing it, after closing virtually everything it still went on and I shot this video. Everything was stopped from things like Dropbox to printer driver processes. I have activity monitor and notepad open in the video.
I have done the suggested things like clear the PRAM. I’m not planning to re-install the OS right now as this is my main work machine and I’m just too busy to spend a couple of days re-installing. If anything, I would go back to Mountain Lion but of course prefer there to be an easier fix – Apple?
Of course, there could be more than one issue going on with peoples machines, reading past posts it seems some peoples problems were fixed by a recent EFI update. And as I said, my machine is an older model, though I have no idea how many people still have my model AND have updated to Mavericks, done all other updates, etc, or who else has found this forum topic.... maybe this is the same problem, maybe not. Sounds pretty similar to a lot of other posts I've read here though.