wireless Apple keyboard stalls requires restart

I've got a 2014 5K 27" iMac.

Since over-installing El Capitan again I've only had a keyboard 'spasm' once after wakeup. On that occasion I just powered cycled the keyboard and it got better without needing a reboot.

I previously had "magicprefs" installed for the magic mouse but removed that prior to OS re-install. Dunno whether that was in any way related.

I have a 2014 5K 27" iMac also. Same issue as others have reported - after sleep the wireless keyboard spasms and key presses are repeated erroneously making it impossible to login. I've tried deleting the keyboard and reinstalling to no avail. Reboot is the only solution. Clearly a bug.

Did you re-install the OS as well? Thankfully an over install worked for me - apple wanted me to do a clean install!

No - I don't want to go through the hassle. Nor should I need to. I am trying the 'preventing the computer from sleeping when display of off' option and hope an update will come soon to fix this.

I have not had the problem over the past several days. The only thing I have done during this period was remove all Bluetooth devices and re-paired them all. I did this because I read a theory on the developers forum that the Magic Trackpad was causing interference in one user's case. Figured it couldn't hurt. Also replaced the batteries in my keyboard as they were getting low.

I am having the same Apple bluetooth keyboard connectivity problems too. It is very annoying. I am now restarting my 2013 iMac multiple times per day. I never had to do this before El Capitan. This update was clearly not finished before it was released to customers.

You might try just powering the keyboard off and on. That works for me and avoids a complete restart. I have unpaired, turned off and put away my wireless track pad and am using just my mouse for now. So far, I haven't had the issue for over 2 days after doing that. Some people think that the trackpad is creating the interference. Either way, it's a bug that needs to be corrected!

Now I am virtually certain that my Magic Trackpad is the culprit in this. I unpaired it, powered it down and put it away and continued just using my Magic Mouse. After 5 days of flawless use of my bluetooth keyboard, I decided to try the trackpad again. I repaired it and used it. After the next sleep, the keyboard was back to its stalling. It seems clear to me that, in making OS X 10.11 friendly to the new Magic Trackpad 2, something relating to the original Magic Trackpad was fouled up. I'm wondering how many others who have had this keyboard issue are also using a bluetooth Magic Trackpad.

After struggling with this since I upgraded several weeks ago, the blue tooth problem with all devices is a constant occurrence. All of the fixes only work temporarily and there is no rhyme or reason to the loss of connectivity. Very annoying it has not been addressed with an update...

Had same issue develop over last week which made login impossible until switching off/on keyboard, came across this

http://davemeehan.com/technology/how-to-reset-an-apple-wireless-bluetooth-keyboa rd-mouse-or-trackpad

I followed the guide towards the end which talks about "Remove All Devices" and "Reset the Bluetooth Module" from the "Debug" section in the "Bluetooth in Menu Bar". Note you will require either a USB Mouse or Keyboard to make it easy, but you can carry out the two stages one at a time rebooting in-between by using the shut off button.

Why is this marked as solved? Preventing the computer from sleeping is not a solution. Odd how this keyboard problem started right about the time Apple came out with a brand new model keyboard for us to buy.

Yeah, resetting allows you to type normally again until your computer goes to sleep then the problem comes right back.

I should add, my bluetooth magic mouse and trackpad work fine, it is only a keyboard issue for me.