Q: clipping sound on new iMac when Logix X is running

Apogee provided an update for Quartet/Maestro 2. Unfortunately, it didn't resolve the freezing problem or compatibility issues with Mavericks on my SSD iMac.

So I exchanged the Quartet for a Universal Audio Apollo Twin Duo. So far no issue with audio playback. Will try some recording this week.

BTW. For audio playback, the Apollo sounds much better than the Quartet or my 1st generation Apogee Duet FW ever did on my previous Macs. Better sound stage, tighter bass and more overall clarity. Sounds solid.

Latest update (see below for set-up):

1. Simple iTunes playback is nearly flawless, although an occasional click appears.

2. Playing my bass along with songs in iTunes using Amplitude remains problematic; still lots of clicks and little hiccups. When I use a sound enhancer such as Amarra, the problem increases by several orders of magnitude.

3. If I hit a note too hard and clipping occurs, then that seems to stress the system even several minutes afterward, and increases the probaility of more clicking.

In my view, the problem remains unsolved by 10.9.2. It is at least bearable, but for a system this expensive, that's not really satisfactory. My hope is that others here have a better outcome, based on how they use their computers for audio.

Set-up: 27" iMac, 3.4 GHz i7

3TB Fusion Drive

16 GB RAM

Apogee FW Duet with Thunderbolt adapter

OS 10.9.2 beta, Build 13C39

Good news. The latest update (January 2014) for the Apogee Duet fixed my audio dropout issue completely. Now I've had the Duet plugged in to the iMac's USB port without a problem in days of intense use. My iMac uses a 7200rpm drive so I've not experienced audio distortion issues ever. Don from Apogee told me that the audio distortion issue is actually now fixed... you guys will just have to wait for the next Mavericks update which will fix that issue.

Beta 6 is out - anyone tried?

Any word on when the final 10.9.2 will come out?

Anyone tried the latest beta version 6 to see if thunderbolt to FireWire external Audio Interface fusion drive problem is completely fixed yet?

We need a name for this above to shorten it :)

Fusion drive core audio crash/bit noise thingy using external audio device...FDCACBXAI...maybe not.

Hi, friends and colleagues in misfortune ... I'm from Russia , Samara ... Immediately apologize because it is very difficult to communicate in English

I think that to spend more than three 3000 greenbacks and encounter such a problem , it is speaking in Russian , to remain with the nose

I December 2013 iMac i7 3500 FD. If I knew would never fly with this thing . Better would have bought with the usual 7200 . I understand that this is the issue .

So we are waiting for the update 10.9.2 . But still, what to expect from the weather by the sea . While working in this way :

Recording occurs through Saffire PRO FW through TB. Interestingly, the recording is done without problems.

But the play goes through the internal output iMac. Because playback stops when going through Saffire PRO. The sound quality is certainly worse. But do not need to reinstall and share ... So , I'll wait for the update .

Ok. 10.9.2 is out.

Would appreciate a roll call from the afflicted to let us know how you're doing!

I have to "re-fusion" my fusion drive, and am not looking forward to it, but that starts tonight.

Good luck.

- noel

I updated now and have been able to record audio without crackles, pops or noise for thirty minutes!!!

It seems to be working, for me that is! :)

This is encouraging newsBelob - thanks for the heads up  - I'll see tonight (fusion drive on a late 2012 mini)

Please post any findings after installing the official 10.9.2 release..  in the following thread....

https://discussions.apple.com/thread/5939976?tstart=0

Thanks...

Used my late 2013 Imac with fusion drive yesterday the first time to record drum tracks. Audio sounded bitcrushed to **** and stoped playing back and recording,also sync problems. Today I installed 10.9.2 and it all worked as it should. Hope that this problem is resolved now....

Thanks everyone who puts time and effort in sharing and helping with resolving these issues.

I accidentally stumbled upon this thread while researching audio interfaces, I've been reading through about half of the thread but still not figured out what might be a solution for me. Like many other posters here I have a late 2013 iMac. But unlike some others, I don't have a fusion drive, just an SSD.

  Model name:                       iMac

  Model identifier:                   iMac14,2

  Processornamn:                  Intel Core i7

  Processor speed:                3,5 GHz

  Memory                              24 GB

  Boot ROM Version:             IM142.0118.B00

  SMC version (system):        2.15f2

  512 SSD (NO FUSION)

I'm looking for any advice, helping me chosing a combination of products that might let me get an audio interface working. If I understand everything right, I will be affected by the USB3-issue, which can not be resolved with a software update.

Is there anyone out there who has the same setup (without a fusion drive), and who got an audio interface from a particular brand working with (or without) an USB-hub from a particular brand?

Oh, I should say: Before I discovered this issue I was looking at Roland Octacapture and Steinberg UR44 (I'm looking for an affordable minimum 4 input interface)

I'm in kind of the same boat as erikhj. I bought and returned a Fusion Drive 2013 iMac a couple of months ago, but I'm really in need of a new computer. And since 10.9.2 has been released I was wondering what the chances are of getting an audio interface working at this point in time. This time I will not be getting a Fusion Drive though, but a SSD.

So my question is this: 2013 iMac with SSD; will it work with an external audio interface?