Sierra, keyboard and mouse/trackpad become unresponsive

Discussion in 'macOS Sierra (10.12)' started by seveej, Feb 16, 2017.

  1. seveej macrumors 6502a


    Dec 14, 2009
    Helsinki, Finland
    Ladies and Gentlemen,

    I'm having a weird issue, and have not found anything online which would help me explain the problem. I hope someone here will be able to help me troubleshoot/resolve the issue.

    MBA 13" i7 (early 2014)
    - external mice (magic 2 and wired logitech)
    - external keyboard (Apple, wired)
    - external display (23" ACD)
    Sierra (10.12.3)

    - All input channels become unresponsive.
    - Typically this happens so that the first which is dropped is the external mouse, thereafter the external keyboard, finally the built-in trackpad and keyboard stop functioning as well. There is usually a lag of about 10 seconds from the first unresponsively until all input devices stop functioning.
    - the computer does not stop functioning (music and video continue to play, menu meters and clock keep updating, it even recognises if I disconnect/connect my BT mouse), but mice and keyboard will stop "working".
    - Nothing indicative showing in console/logs. No crash reports.

    Problem is resolved by:
    - Hard reset (power button for 10 secs)
    - Problem will occur again.

    - Has thus far happened only when connected to external stuff (mouse, keyboard, display).
    - Has started occurring only since I updated to Sierra (update, not clean install).
    - All external devices in question are unproblematic when used with other computer, and were unproblematic before upgrade to sierra.

    - supremely annoying,
    - not fatal (no data loss yet, plus once the ext-mouse becomes unresponsive, I have a couple of seconds to save stuff)
    - Indicative of wider problem?

    I've had this MBA for a couple of months, and have been very happy with it otherwise. I initially bought it for travel/coffeeshops, but have since used it as my main workplace computer.

    Have tried:
    - disk first aid
    - disconnecting&reconnecting external inputs
    - NVRAM reset

    Have not yet tried:
    - SMC reset (Error type not indicative of SMC reset, but will try that next time a hard reset is neccessary)
    - Clean install of Sierra (Trying to avoid wasting half a working day)
    - Roll-back to Yosemite (I'm no fan of the bleeding edge, but I was forced to replace my magic mouse with a MM2, which necessitated the upgrade to Sierra)

    All (non-troll) comments appreciated.

  2. elf69 macrumors 68020


    Jun 2, 2016
    Cornwall UK
    Not same as you but my 2009 and my 2010 macbook sometimes on boot does not see the keyboard and mouse.

    A reboot usually fixes it.

    rather annoying.

    however clean install on my macbooks.
  3. FreemanW macrumors 6502

    Sep 10, 2012
    The Real Northern California
    Option + Command + P + R through no less than two Apple Chimes at startup, Parameter RAM NVRAM Reset.
    See if that has any affect


    Check your %user%\Library\Preferences\ files. There ought to be two, Safari and Extensions, possibly a third for iCloud push.
    Delete any rogue plist files for Safari

Share This Page