Hi, tried to rename AppleBAttery file on Catalina in terminal. It appears messaginge "Read - only file system".

Catalina has System Integrity Protection (SIP). Why would you resort to aged hacks? If what you mention is that. No-one in this thread has mentioned it. Try the latest driver instead.

What's the latest news on T2 Macs and (RME) audio interfaces?

I have been running a UFX II on a 2015 MacBook Pro for a year, BFP for years prior to that - never had an issue.
Now using an iMac Pro and using the UFX II causes the USB system to crash (nothing USB works, requires full restart, no loose cables). UFX II still works fine on MacBook Pro. BFP works fine on both machines.

Got myself into a pickle here with this iMac..

Zero issues on our 2018 MacBook Pro since Apple fixed the USB issue in March 2019. I use both RME interfaces (MADIface Pro, UFX etc) and the ADI-Pro (class compliant) with genuine Apple adapters.

Actually I should say YouTube audio occasionally glitches when switching tabs/windows but I suspect this is a Safari problem. 

The iMac Pro is older than the T2 Macs and I don’t remember it being mentioned on this thread in the past — have you tried one of the Caldigit USB-C hubs?

I have been running a UFX II on a 2015 MacBook Pro for a year, BFP for years prior to that - never had an issue.
Now using an iMac Pro and using the UFX II causes the USB system to crash (nothing USB works, requires full restart, no loose cables). UFX II still works fine on MacBook Pro. BFP works fine on both machines.

Got myself into a pickle here with this iMac..

Basically when playing with lots of layers and tight latency I now normally only get faint, infrequent glitches which I can live with. I can also hook up my Roland JD-XA as an aggregate device with my Babyface Pro (I use aggregate device drift correction to SRC the JD-XA to the Babyface Pro's clock at 96 kHz) and it all sounds incredible. I can even slam loads of keys on the keyboard simultaneously (which used to guarantee a cascade of glitches) and provided voice limiting is active it doesn't glitch much if at all. The combined effect of both the Mojave updates has made things much more robust for me.

My next experiment will be to play for hours to see if the stutter glitch ever occurs twice.... if it doesn't then in any critical situation I just need to ensure I play beforehand for 20mins to get it out of the system : ) I might also try a fresh OS install (again). (I should add I always restart my machine before an audio session to ensure any unnecessary processes are shut down etc. so the timing of the stutter glitch might be related to this.)

My overall feeling is that these issues seem to occur reasonably regularly and then get fixed by Apple and that as users our approach should be to pester them for *much* better diagnostic tools. It is very difficult to investigate audio issues and many of us have wasted countless hours testing wrong theories etc due to a lack of such tools. These issues I would suggest are likely to occur again in the future and it would be great to be better prepared for the next episode. As an example, one thing Apple could do is update AULab including adding an audio test suite to check plugins, drivers and audio performance etc and give standardised statistics. I myself will fill in a macOS feedback form with this very suggestion.

(A final note: having Console app running really does impact audio performance and increase glitching for me. Which is a pain as this is a useful tool for trying to diagnose glitches.)

After several months of owning the new Macbook Pro i9, I've had small little dropouts with the RME Babyface Pro plugged in via a USB-C adapter. I tried several adapters, different cables, isolating just the Babyface Pro.
The dropouts would sometimes happen randomly, without even touching anything, and more often would happen if i plugged and unplugged USB-C peripherals, especially the Macbook power supply.

I think I finally solved the issue!

I found a power supply for the Babyface Pro and since giving the interface it's own power, I have had no dropouts whatsoever. It seems it doesn't like to draw power and audio from the new USB-C (Thunderbolt 3) ports on the new MacBook Pros.

Hope this information helps anyone out there having the same annoying issue!
So far so good.

MAc mini 2018, 10.14.4. and ucx (firmware48, driver v3.15) user here.

I can report that i also have very noticeable random pops, only after migrating from hackintosh & ucx setup.

Will try the usb2 route and report issues.

From what I can see, there is a lot of unnecessary fear-mongering in this thread - don't be completely discouraged, the 6 core machines are a great step up for audio processing.

Good to hear your machine is working well.  I'd like to add another positive voice, since the 10.14.4 OS X update fixed most of our audio glitches too.  I still get occasional drop outs on YouTube or DVD player when switching tabs/apps but I'm not sure it's the same problem, and the important thing is Reaper is stable.

The quad core 13" MBP is a good balance of portability and power and the reviews for the 15" models and Mac mini are encouraging too.

However, I don't think it's fair to brand the discussion 'scaremongering' -- this thread is an order of magnitude more informative and measured than the equivalent one on Gearslutz, which gets constantly derailed, and sticks to the topic which is/was unusable USB 2.0 audio on T2 Macs for 9 months.

Where was scaremongering practiced in this thread? Please provide evidence.

It was quite a muddled situation that Apple needed almost a year to fix its USB stack in the kernel.

The first 6-9 months Apple denied everything and tried to blame the problems on manufacturers of audio interfaces and told the customers in the hotline some nice fairy tales.

If someone ran a professional project studio based on Apple, he certainly had a hard time for a year.

During that time, of course, everyone looked critically at Apple and rightly complained about what a bad quality and poor support it was.

The thing was actually only taken seriously by Apple when, after approx 9 months, the matter went through the press and received more attention.

And now, 14 months later, you come along and say that there was some scaremongering going on in the forum. I have to say that you have funny views. Just be happy that Apple has finally managed it after a long time.

I was quite hesitant to take the jump and upgrade simply because of all the above posts in this thread, however I took the leap and have been working on it now for over a week on a number of different programs, under different buffer sizes with different adapters, apple's included - I have had 0 crashes on my RME UCX so far, and relatively stable performance on all daws (Pro Tools, Logic and Ableton).

From what I can see, there is a lot of unnecessary fear-mongering in this thread - don't be completely discouraged, the 6 core machines are a great step up for audio processing.

From my experience, if you are considering the upgrade and you are running a mac pre 2016 - it is 100% worth it, even if you are running a 2017 model I think you'd notice quite an improvement. I felt it's important to add a positive voice here to counteract the general sentiment.

Cheers,
L