El Capitan USB audio problems.

I just installed EL Capitan on my Late 2012 Mac mini. I have connected NuForce Udac2 DAC to usb port and it constantly disconnects from computer. I can't play any audio thru DAC. Tried changing midi settings, reseting Pram nothing changes. On windows PC dac is working without any problem. Everything worked OK in Yosemite.


There is obviously some problem with USB audio in EL Capitan.

DO NOT UPGRADE to EL Capitan if you have some USB audio cards important for work.


This problem came up in beta releases and still Apple did not fix it. This is a HUGE let down for me, especially considering how many people use Dacs or usb speakers these days.


I guess there is no difference between Apple and Microsoft these days. Everything that is released is not a finished product.


Guess I'll have to wait for 10.11.X for a fix...

Again, awful job Apple.

Posted on Oct 1, 2015 11:53 AM

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333 replies

Jun 14, 2016 2:06 PM in response to Nodilis

I've got the same problem since I switched to the El Capitan, my USB-midi device stopped working after several seconds (simple remove/insert USB cable, or resetting midi drivers can fix this problem, but only for several seconds). On OS X 10.10, everything works perfectly. Today I tried new OS X 10.11.6 and mac OS (10.12). And they don't resolve my problem. I don't believe that Apple will fix this bug in the future... It seems to me that Mac OS 10.10 should be the latest OS which I can use. Sounds poor, Apple just ignores such problems, and I am not the only one who faced with them.

Jun 15, 2016 10:27 PM in response to stubbled

Hey Stubbled,


Did this issue get fixed? I've been running Logic Pro X on Macbook Pro and using Zoom R16 as interface. I upgraded to El Capitan OS X last week and have been having all sorts of audio issues with the R16 since. Lots of hiss and fizz during playback etc. I basically can't use the interface. I updated Zoom drivers and it got a bit better, but it got really bad again last night. Any suggestions? The guy from Zoom told me there is basically no solution at the moment.


Thanks in advance of any tips!

Jun 20, 2016 7:54 AM in response to 42-

I am not sure if it necessarily a hub or not. I've had the problem with a powered hub to the Apple mainboard, an unpowered one and also a separate add-in USB3 PCI-x card

You can lose the audio signal when a system alert sound comes, when you've gone away and in other circumstances.



However, of course, it is more important adding SIRI to an operating system and purposefully shutting out old, but working systems, such as a Mac Pro 2009, that is still more powerful than a lot of products the iPhone company is coming out with.


Forgive my sour feeling. Apple has managed over the years to turn a "fanboy" or advocate into someone who suffers them. As long as my existing software works and machine can do its job I'm sold. The saving glory is they are not as s--t as Microsoft, yet, but they seem to be rushing in that direction.


Yes, more important for SIRI, so we can say "Hey siri why does Apple not care about pro users and a stable set of basic functions" to which it will answer that it doesn't understand and would I like to buy a pizza or some such nonsense.

Jul 11, 2016 10:34 AM in response to otsmpotsm

I have been having similar problems with my KEF X300A active speakers that have built-in DACs. I tried switching cables, changing setting settings in Audio MIDI, switching to USB ports, turning off Bluetooth, turning off cell phones, other nearby computers, all to no avail.


I even tried using Yosemite partition.


The disconnects always appeared to be random, generally preceded by clicking noises from the left speaker. However, I seemed to be able to produce the issue by rapidly changing the volume level up-and-down with the keyboard.


I visited the KEF website and checked out their FAQ section. One of the things listed was to uncheck the options for, "Player user interface sound effects." I'm keeping my fingers crossed, but so far I haven't had any disconnects. I also unchecked the option for, "Play feedback when volume is changed."

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El Capitan USB audio problems.

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