Bluetooth unavailable post 10.11.4 upgrade

OK so I installed the 10.11.4 upgrade as it was offered in the updates section of the apps store.

Since then, no Bluetooth, so no keyboard or trackpad, unless I plug them in via lightening cables.

I have tried -

1. Removing the Bluetooth plist file and rebooting with no other peripherals plugged in.

2. Reset the SMC.

3. Both 1 and 2 above

Have had no result so still no bluetooth.

I'm not impressed, for a brand new iMac to fail on an Apple update and, more importantly, it's not impressed SWMBO, (She Who Must be Obeyed), who was anti the switch from Windows to Apple anyway. So I lose - no change there then 😀

Whats the next think to try? Hand it back to Apple?

iMac (Retina 5K, 27-inch, Late 2015), OS X El Capitan (10.11.4)

Posted on Mar 30, 2016 12:25 PM

66 replies

NDalby

Level 1

15 points

Jun 1, 2016 12:46 AM in response to hankyc914

Have you tried deleting the Bluetooth plist file followed by NVRAM reset? It has worked for a few others on different forums however only a clean re-install fully sorted out my Bluetooth issues.

Jun 1, 2016 4:01 AM in response to NDalby

Tried it several times...

i'm hoping that an edit of NVRAM from another user will fix it,

Thanks

Henry

Jun 1, 2016 4:12 AM in response to hankyc914

I don't know how to edit nvram.

Speak to your dealer or at apple hotline: it's their job, to solve the prob.

Jun 1, 2016 4:14 AM in response to Peter in Aachen

OK Thanks anyway for all your help.

Aug 13, 2016 9:41 AM in response to hankyc914

Hello NDalby: Is your flickring problem solved?

By the way, I'm on public beta of 10.12 ("Sierra"), everything runs fine, bluetooth-driver now is 5.x

NDalby

Level 1

15 points

Sep 27, 2016 3:15 AM in response to Peter in Aachen

Recent installation of Sierra fully resolved the bar issue. Must have been a firmware issue that was addressed in the new OS.

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Bluetooth unavailable post 10.11.4 upgrade