My fingers feel something on the 2015 rMBP trackpad surface

Discussion in 'MacBook Pro' started by KillerHuy, Mar 31, 2015.

  1. KillerHuy macrumors newbie

    Mar 31, 2015
    I've just got a new MBP 2 days ago. So far I'm loving the new force touch trackpad. However, my fingers can feel a tiny bit of something appears on the trackpad surface. It is hard to describe. I've have looked carefully and the trackpad is beautifully fine. This thing is completely invisible. You can only feel it with your finger.

    I tried two display models in authorized stores, one got similar issue like mine, the other is smooth as butter. So I'm very confused right now. Is this thing normal for a new machine and will be gone later on? :confused:
  2. Samuelsan2001 macrumors 604

    Oct 24, 2013
    Haptic Feedback???

    Look it up it's what gives you the click feeling without a phsical click you may just be very sensitive too it.
  3. KillerHuy thread starter macrumors newbie

    Mar 31, 2015
    I actually know the clicking feel. This issue is like the trackpad surface is not completely flat. You can feel like a tiny line on the surface when sliding your fingers on it.
  4. Samuelsan2001 macrumors 604

    Oct 24, 2013

    this may be down to the haptic feedback, the mechanism that creates the "click".
  5. KillerHuy thread starter macrumors newbie

    Mar 31, 2015
    Hopefully that's the one. Thanks for your help :). Anyone experiences something like this?
  6. FumbleDuck macrumors member

    Jan 9, 2015
    Not quite the same but I can feel a kind of very, very, faint vibration on the top surface of the mid-2014 15 rMBP when I run my fingers across the metal. Only when moving my fingers - cannot feel it when my fingers are still or when the machine is off.

    It doesn't bother me at all and I've put it down to the vibration (maybe phasing) of the fans running at their lowest speed.
  7. totten76 macrumors regular


    Mar 12, 2015
    I was in a Best Buy store today playing with one and I experienced the same thing. To me it felt like it was supposed to be there, and I only could feel it when I actually tried to.
    Did you try changing the sensitivity at all? Maybe that could help
  8. Hieveryone macrumors 68040

    Apr 11, 2014
    I often times use a magic mouse. You don't have to though there's plenty on Amazon. Logitech is really good.
  9. yangchewren macrumors regular

    Dec 1, 2012
    Are you using the grounded (3 pin) cable to the mains?
  10. FumbleDuck macrumors member

    Jan 9, 2015
    The charger only has two pins internally that I can see. I then attach the three pin adapter for UK plugs. From what I can see of the adapter and magsafe charger, I don't think the third pin connection makes it through to the laptop.
  11. Hyuga macrumors regular

    May 16, 2006
    Helsinki or Barcelona
    That strange feeling/sensation what you get from surface disappears when you use extension cable (grounded cable).

    First time I noticed it was when Unibody laptops came out, and I can still feel it with newest retina laptops.
  12. ha1o2surfer macrumors 6502

    Sep 24, 2013
    Yup know exactly what your talking about. Have a friend touch your skin while your touching your laptop.. your friend will also feel the electrical vibration too it's really funny! so yeah, use a grounded plug and that "vibration" feel while dragging your finger over the laptop will go away.
  13. FumbleDuck macrumors member

    Jan 9, 2015
    How exactly do I use a "grounded" cable? AFAIK all power cables in the UK are grounded (they all have three pins). The actual Apple magsafe charger (white block) only has two pins on it (but the small UK adapter that "snaps" into the white block has three pins on it (it has to to fit UK sockets) but as far as I can tell, the third pin is not electrically connected into the white Apple magsafe block?

    Hope that makes sense.
  14. yangchewren macrumors regular

    Dec 1, 2012
    If u are using the UK plug, you must use the long cable version with a full 3 pin head to get it earthed. As you've mentioned, the compact, cable-free version is not grounded.
  15. joe-h2o macrumors 6502a

    Jun 24, 2012
    As yangchewwren mentioned, the small block doesn't have an electrically connected earth, but the full length cable does have an earth connection.

    The metal pin that the plastic slot fits over on the PSU is the earth point, and the long cable has metal leaf springs inside the slot that electrically connect it to ground. The stubby plug block lacks these springs.

    Either way, the MBP itself only sees two connections (+DC and ground) from the PSU itself, but this doesn't mean that it's immune to any ripple from a bad AC source, but the PSU is pretty good at filtering that out.
  16. nj-mac-user macrumors 6502


    Jun 1, 2009
    Or you could just plug the 2 prong Apple wall adapter into a grounded surge protector versus directly into the wall I suppose.
  17. FumbleDuck macrumors member

    Jan 9, 2015
    Yup - you guys are right, the power lead has electrical connections to continue the ground pin but the adapter block does not. How strange.
  18. yukyuklee macrumors 6502


    Jan 4, 2011
    Boston, MA
    im scared to look for this on mine, it will drive me nutts lol
  19. BriOS macrumors member

    Oct 23, 2014
  20. KillerHuy thread starter macrumors newbie

    Mar 31, 2015
    Thanks for all the helps. I brought my mac to an authorized store and they confirmed that there were some tiny bumps on the trackpad surface which was not normal. I've already contacted Apple for a replacement.

    Did your finger feel like there was some tiny bumps on the surface? Or it was just a clicking feel from a new trackpad?

    I also do a little gaming (Dota anyone? :cool:). So a trackpad and cheap bluetooth mouse is okay for me.

    Yeah I'm kind of a perfectionist so it is very annoying to me, especially with the macbook.

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