I had an AU Lab preset saved from before updating to Mojave that used to work on macOS High Sierra.

It seems that the combination doesn't seem to work any more on Mojave. I'm not seeing any response in AU Lab at all.



I found this thread on Apple's Support Communities: AU Lab Not working on MacOS Mojave .

There's an answer that states:

Update: I was able to make Au Lab show permission request, finally. I think the reason it didn't ask permission before was that it was somehow cached since I had Au Lab in my /Applications before updating to Mojave.

It did request permission when I downloaded new version from iTunes - Mastered for iTunes - Apple (CA), unzipped it right in my Downloads folder and launched it from there, without moving to /Applications folder. That's when it said it's an app downloaded from the internet are you sure bla bla and then when I created document it asked for permission.

After that you can delete Au Lab copy from Downloads and continue launching from /Applications — it'll work.

Downloading it and replacing it with the new one from Apple also worked for me.

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The only reliable way this would work is to manually edit the TCC trust database:

sudo sqlite3 /Users/proffan/Library/Application\ Support/com.apple.TCC/TCC.db "insert into access VALUES('kTCCServiceMicrophone','com.apple.audio.aulab',0,1,1,NULL,NULL,NULL,'UNUSED',NULL,0,1541440109) ;"
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