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macbook pro electric shocks

Have had my Macbook Pro for just over 12 months and since day 1 - if i use the 3 pin plug i get electric shocks from my Aluminium Unibody, its the same if i fit a European type plug but NOT if i use the long flex lead - i think this is because it has an earth...


So - why is my Mac giving me shocks, and does anyone else have the same issue?


I know its not just my Macbook Pro - i bought my daughter an iMac 21" last month and i was trying to plug a USB printer in to it in the dark and as the USB connector made contact with the aluminium body there were sparks...


anyone else find this?

MacBook Pro, Mac OS X (10.7.4)

Posted on May 21, 2012 3:02 PM

Reply
78 replies

Aug 13, 2015 1:31 PM in response to petermac87

Again...I have.


The exact same problem in many different locations - houses (own and others), various hotels, different airports. Notice how most of these places don't have wooden or carpeted floors. I have had the fortune of traveling around with the device and using it in a great number of scenarios.


The manual mentions something completely different. There's nothing about casual electric shocks nor about the slight tingly current people complain about in this and numerous other threads.

Aug 13, 2015 1:34 PM in response to petermac87

The trick to knowing whether or not this problem exists is by standing barefoot on a marble or stone floor and using the laptop plugged in to a power outlet. FWIW, if all the power outlets were flawed, all the other devices would be having problems, no? Feel free to query folks in this thread if that is the case with them.

Aug 13, 2015 9:03 PM in response to petermac87

If you feel nothing even though you are 1) bare feet on the floor 2) on a stone/marble floor and 3)with the laptop plugged in, I must say not everyone of us is equally lucky... Could be an issue affecting many but not all MacBook Pros. I say many, because I had mentioned this casually to an Apple store employee (when the laptop was out of warranty) and he remarked that it is not uncommon, and I should not worry about it, especially since it will be quite expensive to attempt to fix the laptop out of warranty as the case and/or battery might need replacement. So I just choose to wear insulating footwear. And have no problems except: 1) the slight tingly feeling, and 2) touching two plugged in MPBs together.

Aug 13, 2015 9:24 PM in response to petermac87

Pete, I just typed Macbook Pro electric in Google and the first four auto completed suggestions are:

  1. Macbook Pro electric shock
  2. Macbook Pro electric shock while charging
  3. Macbook Pro electric vibration
  4. Macbook Pro electric shock vibration


Here's a screenshot:

I am sure we can agree Google auto completion suggestions are based on common search queries. To be sure, I am browsing in private mode, have cookies disabled for good measure, and am not signed in to any Google services - so that my search history can't bias the suggestions. You can read at https://support.google.com/websearch/answer/106230?hl=en that Google auto complete suggestions are mainly based on what other people have searched in the past.

User uploaded file



Here are some of the top results, from what I am sure you will recognize as mostly popular websites.


While I don't doubt your particular machine might be lucky, if indeed you have tested as I suggested (laptop plugged in, bare feet on stone/marble/concrete floor), I hope you can see that these incidents are actually relatively commonplace. FWIW, the recent unibody aluminum laptops by HP and Dell have similar complaints too. Which leads me to believe, it has more to do with the metallic unibody design than anything specific to Apple.

Aug 14, 2015 6:19 AM in response to carl wolf

Apple laptops are supposed to be double insulated . This means there is no need for an earthing outlet.


Besides, earthing is mainly for protection against surges, and from static - which builds up with usage. This is not an issue, it doesn't happen by design (double insulated). The tingling is something that happens from tiny leaked currents, and it is persistent in the laptops where it happens. I have actually not seen a three-pin adapter in use by the MacBook owners I know (in the Netherlands). And the Apple stores only say the current is harmless, so one needn't bother.


Maybe harmless, but certainly most annoying to some, and I think it is something people should be warned about. I do not believe a company has the right to shock people with small harmless amounts of electricity on a daily basis, without forewarning.

macbook pro electric shocks

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