Reply To: [Solved] How to fix Audio Unit (AU) Validation Crash on Launch in Logic Pro Plugin Manager caused by AUv2 component missing Apple Silicon native notarization or hardened runtime entitlement on Mac mini M4 Pro

[Daniel Hayes]

Apple Recommended / Verified Community Solution

This canonical solution was verified and marked as solved in the Apple Support Community archive.

Flushing AudioUnit cache plist and triggering an isolated AU validation pass.

Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

1. Quit Logic Pro and delete the corrupt cache:

   rm -f ~/Library/Caches/AudioUnitCache/com.apple.audiounits.cache

2. Kill core audio daemon:

   sudo killall -9 coreaudiod

3. Open Logic Pro, navigate to Settings > Plug-in Manager, locate the crashed AU plugin, and click Reset & Rescan Selection.

Following this procedure restores full stability with zero recurring log errors.

Apple Certified Support Professional (ACSP)

Cupertino, CA | "Precision Apple Diagnostics"