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keyboard not responsive after sleep

Mac keyboard not responsive after sleep. you must rebut computer and then allows you to type. bad deal.

Please reset the SMC several times and ensure all peripherals are disconnected when doing so.

iMac SMC and PRAM reset

Please reset the SMC several times and ensure all peripherals are disconnected when doing so.

iMac SMC and PRAM reset

Also try each step at > If your Apple wireless mouse, keyboard, or trackpad aren't working as expected - Apple Support

I also have this problem. I've reset my SMC and PRAM. No effect.

The other response, to If your Apple wireless mouse, keyboard, or trackpad aren't working as expected - Apple Support below, is also not relevant.

My situation:
2012 Non-Retina MacBook Pro

KUL ES-87 external USB keyboard

Everything was fine on El Capitan. (I was never able to use my keyboard to wake the computer, but it always worked fine after I woke my computer with the mouse.)

On Sierra, if I sleep my computer briefly, keyboard works fine on wake.

If I leave my computer asleep for a long period (hard to know the threshold), then my keyboard is unresponsive on wake.

Unplugging and re-plugging my keyboard makes it work again.

This is bearable but extremely annoying, and it clearly has something to do with Sierra. :\

最后更新：2017-09-11 03:07:10

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