Electric Shocks on new 13" rMBP Touch Bar

Discussion in 'MacBook Pro' started by The Samurai, Apr 27, 2018.

  1. The Samurai macrumors 68000

    The Samurai

    Dec 29, 2007
    Each time I connect my rMBP 13" (touchbar model) to my television via HDMI (via USB C dongle), each time i lay my hands or touch the macbook i get a shock as to say theres live current going through the whole system.

    Anyone else experience this?

    Yes, i've tried various different dongles and the result is the same. I've also tried different branded HDMI cables and more recently an entirely different television.

    Any ideas?

    p.s. my previous 13" rMBP 2015 didn't have this ;(
  2. jerryk macrumors 601

    Nov 3, 2011
    SF Bay Area
    If you mean a slight tingle, people have reported this in other threads. It is harmless. If you use a grounded extension cord it does not occur.
  3. BeatCrazy macrumors 68000

    Jul 20, 2011
  4. Ma2k5 macrumors 68020


    Dec 21, 2012
    There was a time Apple used to provide the extension cord, so you wouldn't have to experience this. But as above, it is harmless (albeit annoying).

    You can buy it in addition to your MacBook at the price of £19, along with any other dongle accessories you may require.
  5. tekfranz macrumors member

    Mar 16, 2017
    The same thing is happening to me. Mild tingling on the palm rest that goes away when you use a long cord with a ground prong.

    I never had a Mac that had this issue so I am not sure if i should return it while I still can. Aplle of course wants me to go to the Genius Bar to get it checked it out.
  6. 537635 macrumors 6502a

    Mar 7, 2009
    Slovenia, EU
    Look up this issue on Google. There are tons of these topics.

    Summary: Get a cable to connect the power brick with the electrical socket. Every Apple Store has them. It has three pins. It grounds the power brick and it grounds the Macbook. No more "buzzing". Been using this for years now.
  7. GtrDude, May 12, 2018
    Last edited: May 12, 2018

    GtrDude macrumors 6502


    Apr 17, 2011
    Yet another way for Apple to make us buy more stuff from them.
    Up the price but don't include the extension cord and make the faithfuls buy it in post.

    The ones who don't buy get electrocuted until they buy the dang thing...lol
    Oh yeah, make sure there is no ground prong in the power adopter.

  8. tekfranz macrumors member

    Mar 16, 2017
    Yep I happened to have an extra Mac extension cord adapter around and I am using it. It definitely takes care of the issue in my testing.
    Actually instead of going into the store I called in to Apple again and got a member of the "Safety Team". He repeated exactly what you said. So to summarize, ***as long as you are not being shocked or injured in any way*** the static tingling/hum is normal when using the power brick only when your body is well grounded (i.e. barefoot) and is remedied by use of the 3 prong extension cord with ground plug which you can buy from Apple for $19.

    I can do this although the extra cord crowds my Laptop bag.

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