An audio Unit plug-in reported a problem which might cause the system to become unstable

Is there a log or anything to indicate which plug-in is acting up? It seems a bit weird that they don't give any indication (or that they don't know which one it is).

Yes, there is. Go to Utilities > Console. In the Console.app look for Crash Reports.

Ah, of course, thanks!

Unfortunately, in every case the crashed thread points to "JUCE Timer" and several regularly-used plugins are involved—mostly Spitfire (native UI) and SWAM, in my case. Since JUCE is becoming a common framework for plugin development this isn't great... Hopefully they sort out whatever is going on soon, as I can't really do without the plugins involved.

I know JUCE plays a large part in UI development, so I may just trying closing plugin UIs as frequently as possible after I've used them. One thing I have noticed is that the crashes tend to get reported when I return to Logic after having moved focus away from it. So it may have to do with displaying the plugin UI again or becoming the focus for device input after having given it up.

Being on an M1 MBP, so far I no longer get it on Rosetta. However, there ARE some plugins whose website say they are not yet compatible with Apple silicon or that Rosetta must be used. Not obscure plugins, but still. One is Grandeur, a beautiful piano I bought after seeing Sanjay C do his comparison. Spitfire’s BBC Discover orchestra is another. If I go off Rosetta, I get the error, even if I delete those plugins. Still trying to figure this out.

I have Logic 10.8.1 installed 1 month ago, osX Sonoma 14.4.1, MacBook Pro M2

I was using it fine for a month with a stock plugins, but the day I've installed FabFilter Pro Q-3 and Waves Harmony (demo with mutes) I started having this issue - not sure which one of two caused problem for me, but maybe it will help people here to narrow it down.

Dunno if you're still having this problem and I don't know if my workaround will apply as it was in garageband. It gave me the same prompt and I found a really rough and potentially harmful way of fixing it. As you open the file spam press the your backspace/delete button. It'll delete whatever track was selected before it gives the audio unit prompt. It'll instead prompt you with the save progress pop-up, if you didn't delete everything hitting cancel then delete right after. When all of it is deleted hit don't save and it'll close out the software. Reopen it and it shouldn't have that issue, HOWEVER; I'm not certain it'll work as smoothly as it did for me. It may just fully delete your file if not careful or by random. Try this with caution.

Dunno if you're still having this problem and I don't know if my workaround will apply as it was in garageband. It gave me the same prompt and I found a really rough and potentially harmful way of fixing it. As you open the file spam press the your backspace/delete button. It'll delete whatever track was selected before it gives the audio unit prompt. It'll instead prompt you with the save progress pop-up, if you didn't delete everything hitting cancel then delete right after. When all of it is deleted hit don't save and it'll close out the software. Reopen it and it shouldn't have that issue, HOWEVER; I'm not certain it'll work as smoothly as it did for me. It may just fully delete your file if not careful or by random. Try this with caution.

I am extremely frustrated and disappointed with Apple's lack of attention and support towards professional users like myself. After experiencing recurring stability issues with Audio Units in MainStage, I updated my system to macOS Sonoma following recommendations that this would solve the problems. However, the issues persist.

It’s a disgrace that Apple, with all its resources, seems to focus more on selling products rather than ensuring the reliability of the systems that many professionals rely on daily. I have invested money in original software and supposedly high-quality hardware, but all this seems to be in vain when the technical support falls short and system updates, rather than helping, appear to complicate things further.

I am seriously considering switching operating systems because I am tired of dealing with these continuous problems that not only consume my time but also affect my work. It’s disheartening that a company like Apple does not take the needs of its professional users seriously.

It seems all that’s left for us users is to stop investing time and money in a company that does not seem to care about us. How many more updates do we need before Apple finally addresses these issues instead of introducing new ones?

I might have used Migration Tool. What problems should I expect after doing so?

Luckily, it seems to have been fixed with Sonoma 14.4.1. I don't experience these issues anymore since I updated.

Is there a log or anything to indicate which plug-in is acting up? It seems a bit weird that they don't give any indication (or that they don't know which one it is).

UPDATE: I just had it come up again after leaving and returning to Logic, but no plugin UI windows were open. Still, it does seem connected to app focus...

Go to

Utilities > Console > Crash Reports

really? i guess it shows the failed plugins in the plugin manager?

only when the error window pops it does not. I agree that such vague notifications are the **** in music making with computer...

correct