USB not working after upgrade to El Capitan

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Level 1

10 points

USB not working after upgrade to El Capitan

I seem to have an issue with USB connected devices on my Mac mini after I upgraded to El Capitan. most specifically, my USB headset, attached through the USB on the keyboard keeps disappearing. But, the wireless mouse connected to the other USB port is fine. This happens multiple times daily. This morning though, a problem reoccured that has happened occasionally. It happened right after I installed El Capitan. The keyboard was not recognized at all. Nor the two devices connected to the USB ports on the keyboard. If i unplug and replug the keyboard a few times, it comes back. but only the mouse and keyboard, the USB headset I have to unplug and replug in addition to unplugging and replugging the keyboard.

Mac mini, OS X Mountain Lion (10.8.5)

Posted on Nov 3, 2015 7:17 AM

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Answer 1

lllaass

Level 10

210,417 points

Nov 3, 2015 8:06 AM in response to Tommygunnz

- Try resetting the SMC and NVRAM/PRAM

Intel-based Macs: Resetting the System Management Controller (SMC)

About NVRAM and PRAM

- Try starting in Safe Mode

OS X: What is Safe Boot, Safe Mode?

- Boot to Recovery and repair the startup disk

OS X: About OS X Recovery - Apple Support

- If it is repairable reinstall the OSX

How to reinstall OS X on your Mac - Apple Support

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Answer 2

Tommygunnz Author

Level 1

10 points

Nov 4, 2015 2:01 PM in response to lllaass

I tried the first two, it seems better, I only had to unplug the USB headset once today. The Keyboard issue has not reoccurred. But now, Lync crashes 4 or 5 times a day.... 🙂 I'm going to try a clean removal of Lync. if that doesn't do it I'm going to reimage.

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Answer 3

Tommygunnz Author

Level 1

10 points

Nov 9, 2015 6:28 AM in response to lllaass

Tried all this, I completely reinstalled the OS and the problem still occurs. I had to unplug and replug the keyboard, mouse and headset. Anyone else out there seeing this?

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Answer 4

Tommygunnz Author

Level 1

10 points

Nov 16, 2015 10:44 AM in response to Tommygunnz

This is still a problem. I have done a clean install of El Capitan on a new SSD from a thumb drive. Anyone out there seeing this?

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Answer 5

Menkow

Level 1

6 points

Dec 2, 2015 11:45 PM in response to Tommygunnz

Have same issue and have found solution right now - install this software http://smoothmouse.com/

and all works fine (in my case).

Hope this will work for you too.

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Answer 6

Tommygunnz Author

Level 1

10 points

Dec 3, 2015 6:07 AM in response to Menkow

Really Menkow? sigh.....

By the way, it is a three year old Mac mini so I went back to Yosemite and it works fine. Guess i'll wait until i get a new Mac mini before I upgrade to El Capitan

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Answer 7

Jan 9, 2016 11:15 PM in response to Tommygunnz

II've been having what may or may not be the same problem since El Capitan: Most obviously (and annoyingly) my Logitech wireless mouse regular fails to grab windows for moving or resizing. I've experienced it with and without Logitech's current mouse management app and driver. I've installed fresh batteries. It's also sometimes hard to place the edit cursor where I want it or to select text accurately. This has only occurred since El Capitan. IThe keyboard seems to be ok. I don't use the touch pad enough to know if the problem manifests there.

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Answer 8

Feb 10, 2016 6:41 AM in response to Tommygunnz

i seen similar malfunction since upgrading to 10.11. every time i connect my external keyboard to my MacBookAir6,2, i have to unplug it and re-plug it for it to work. same with my scanner and iPhone 6S :-/

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