El Capitan - Bluetooth repeatedly disconnects on Mac Mini

I've also been having this problem since updating to OS X 10.11. My magic trackpad and apple keyboard both disconnect periodically, at the same time, and then reconnect after several seconds. I've tried disconnecting USB devices then fully shutting down, that did nothing. I've also tried removing the profiles of all bluetooth devices and then pairing again, that did nothing. The update to OS X 10.11.2 also did nothing to change this, sadly. Any suggestions welcome!

Same issue here- iMac 27 Late 2013 - now on 10.11.2.

Can work perfectly well for hours and then suddenly the mouse scrolling will stop and the mouse will disconnect and reconnect. Sometimes the keyboard goes haywire and starts showing random characters - unrelated to anything you type. Tried all the usual steps - I don't have a wired device to try to be able to turn bluetooth off and on, or to delete all devices, because I have a wireless mouse, keyboard and trackpad.

I am certain this started with the upgrade to El Capitan.

Any suggestions welcome here too..

This seemed to have fixed my problem thanks.

My problem was similar, but somewhat different. The keyboard stopped working, so I changed batteries (twice) but could never get the keyboard to connect. (Same keyboard as I have used for a few years). So I did the suggested SMC reset. While doing that, I mulled over the comments from others about nearby devices. So I checked my iPhone 6S and decided to shut off the Bluetooth on it - I had been setting my iPhone on my desk very close to the MacBook.

Then I tried a Bluetooth keyboard connect and it did so, immediately.

Sorry that I did two changes at the same time, which muddies if either or both changes fixed the problem.

Thanks radioroe! The idea of a nearby bluetooth device causing interference is an interesting one. I also leave my phone right on the desk. There were never any problems before El Capitan even with the phone nearby, but it's certainly worth a try. I also seem to notice that I have more disconnections when my wife is working on her (Windows) laptop in a nearby location. Intriguing, even though know it may all be irrelevant! I'll update, especially if this seems to work.

I have tried EVERYTHING posted on the forums:

• Reset SMC
• Turn off Wifi, turn it back on and reconnect bluetooth
• Remove bluetooth connections that are listed from networking sidebar in system preferences
• I've actually tried two different Magic Mice, same result: constant disconnects

There is no clear fix to this issue. This is a basic feature that is not functioning as intended, therefore it is definitely a bug of some sort. Anything like this that the user has to troubleshoot to this extent is not the fault of the user.

Apple, please fix this! I have wasted HOURS trying to get this to work, during time when I need to be working.

OK, I found a non-intuitive but effective solution to this here.

In short:

1. Go to System Preference—General
2. Uncheck “Allow Handoff between this Mac and your iCloud devices”
3. Restart your Mac

I have had a full day without any bluetooth issues; it has been months since the last time I could say that.

Hummm. I clicked this solved my problem, but the next day it started again.

Yeah, I eventually encountered the problem again; took a couple days. Restarted and got another couple days. So unfortunately this isn't a complete solution but it definitely is an improvement.

El Capitan 10.11.3 was just released. Anyone tried it already? Anyone knows whether there is a solution to this problem?

After update I still have problems with Apple Keyboard continuosly disconnecting and connecting again, randomly but very frequently. The udpate did not fixed the bug. Tried evetything but it is still there. I will never more purchase and Apple keyboard again.

Did you disable the Handoff option in Settings -> General (see post by axotl earlier in this post)? I don't know whether that is still needed, but I have it off, and since the upgrade I have no longer had the disconnection problem (for at least a week now).

I will try your suggestion and I will let you know. Thanks very much (even if it is at least strange that, for fixing a problem, you have to deactivate an important functionality of you Mac...).

fwiw, as a data point, 10.11.3 didn't really change my bluetooth experience much from the way it was with 10.11.2 and Handoff turned off. Namely I go much longer between disconnections, and re-connections happen more quickly, but it still happens. The problem is bearable. Next step is to line my apartment walls with foil and lead to make an improvised Farady Cage.

(my keyboard just disconnected and reconnected, ha!)

Unfortunately Figante suggestion is not working. Disabled the handoff option and reboot but the disconnection problem is still there. Thanks