El Capitan - Bluetooth repeatedly disconnects on Mac Mini

Same issue here. iMac, worked fine until El Capitan and now bluetooth mouse and keyboard randomly disconnect. Can be fine for hours and then every minute.... Definitely upgrade related. I had this once on a previous OS version and it was fixed with an incremental upgrade. Hope the same happens for El Capitan.

It's an Ixian virus...

I too still experience this same issue which your post accurately describes. It seems to be less frequent recently, but it is very difficult to quantify frequency as it occurs in an apparent random manner.

It would be great if a cause could be determined...

I believe this is the problem. Not sure how to fix it yet though:

from log when I disabled then enabled icloud:

ec  2 19:22:28 --- last message repeated 1 time ---
Dec  2 19:22:28 iMac blued[90]: ***** Removing all cloud paired devices 
Dec  2 19:22:29 iMac identityservicesd[492]: ApplePushService: <APSConnection: 0x7f8004139000> Received message from apsd: <APSIncomingMessage: 0x7f80043416d0> but it didn't match the enabled topics: (
      "com.apple.private.alloy.icloudpairing"
  ) or opportunistic topics: (
  )
Dec  2 19:22:31 iMac com.apple.usbmuxd[84]: _SendAttachNotification Device 7c:01:91:9f:c6:fd@fe80::7e01:91ff:fe9f:c6fd._apple-mobdev2._tcp.local. has already appeared on interface 4. Suppressing duplicate attach notification.
Dec  2 19:22:34 iMac blued[90]: Device Connected with address: 84-fc-fe-e7-03-1f and classOfDevice 0x002580 and connectionHandle 0x000b
Dec  2 19:22:34 iMac blued[90]: HID Device connected isIncoming = 1, deviceClassMinor = 32, isPaired = 1, isConfigured = 1
Dec  2 19:22:34 iMac kernel[0]: [BNBMouseDevice::init][90.3] init is complete
Dec  2 19:22:34 iMac kernel[0]: [BNBMouseDevice::handleStart][90.3] returning 1
Dec  2 19:22:34 iMac kernel[0]: [HID] [MT] AppleMultitouchHIDEventDriver::start entered
Dec  2 19:22:34 iMac loginwindow[99]: Preferred Localizations total: 1 contents (
      English
  )
Dec  2 19:22:34 iMac kernel[0]: [HID] [MT] AppleMultitouchDevice::start entered
Dec  2 19:22:35 iMac secd[506]:  SOSAccountThisDeviceCanSyncWithCircle sync with device failure: Error Domain=com.apple.security.sos.error Code=1035 "Account identity not set" UserInfo={NSDescription=Account identity not set}

Can anyone confirm if this is resolved by the latest release (10.11.2) which suggest a fix for disconnecting Bt devices was included??

This update has not resolved the connectivity issues for me

So far so good for me......

FYI - I successfully resolved the issue before by disabling handoff (as suggested by some other users). Post the update, I have re-enabled handoff and so far have not had any disconnects (sods law I will get one after I write this!!!!).

my ipad would not stay connected to my macbook pro via bluetooth.

long story... after all this it's staying connected:

- mac upgrade to 10.11.2 (which i don't think mattered)

- ipad upgrade to 9.2

- reset pram on mac (from power off hold control-option-command-R-P and power on!)

- reset SMC on mac (pram reset alone didn't work - at power off press left-shift-control-option and power button - it won't power up but the action does clear smc - then you let go and do reg. power on)

NOW my ipad stays connected via bluetooth to my macbook pro.

however, my whole reason for working on this is because AirDrop doesn't work (although my iPad can see an iPhone nearby) - grrrr.

aaaand... that didn't last long. now it's disconnecting again. 😟

one oddity - in the bluetooth menu (click on icon on menu bar) - it shows other devices (that are not connected), but not the iPad UNTIL it's connected.

BItkahuna..... This thread has nothing to do with your post.

FYI connecting an iPad to an OS X computer is not supported. There are methods to transfer data between the devices Airdrop, for example.

Barry

The Fix for my iMac was to remove all the bluetooth connections form the list in System Preferences - Bluetooth. You will need a USB mouse to pair the devices one by one. I too had dropping magic mouse connection and interrupted playback on a Bluetooth v4.0 device in another room. Now everything works perfect.

Barry, you mean it has nothing to do because I have a Macbook Pro and not a Mac Mini?

Because per the start of the title, I am experiencing this:

Bluetooth repeatedly disconnects

Hello, there's a test a want to try which is to debug the Bluetooth communication stack, like listening the protocol messages sent between devices in order to understand what could be wrong. Several users have reported intermittent issues, some of those were resolved by resetting SRM in the OS, others by reconnecting the devices one by one. But I think the problem might be in the implementation of the bluetooth protocol in el capitan. Any thoughts? I am considering to apply for a Mac os developer job if I get to that.

The latest update does not fix it for me. I have two wireless keyboards; one old, one brand new, as well as two magic trackpads. One set for work, one for home. OSX disconnects both trackpad and keyboard at the same time about 50 times a day. There is no information in the blued logs about the disconnecting, only that they were reconnected.

EDIT: @Apple: Please disregard the happy duck. I am very disappointed.

Try THIS!

The Fix for my iMac was to remove all the bluetooth connections form the list in System Preferences - Bluetooth. You will need a USB mouse to pair the devices one by one. I too had dropping magic mouse connection and interrupted playback on a Bluetooth v4.0 device in another room. Now everything works perfect.

10.11.2 update fixed problems with my Magic Mouse not working. Similar experience: Bluetooth preferences initially would say the mouse was connected, but it wouldn't scroll. Then it would start disconnecting.