[Solved] Mac mini M4 Pro encountering Audio Unit (AU) Validation Crash on Launch in Logic Pro Plugin Manager after update (macOS Sequoia 15.1)

[Terry Ross]

Diagnostic Hardware Specs: Mac mini M4 Pro | OS Version: macOS Sequoia 15.1 | Archive Source: Apple Support Community #256214285

I am running into a persistent issue on my Mac mini M4 Pro running macOS Sequoia 15.1.
Whenever the machine encounters AUv2 component missing Apple Silicon native notarization or hardened runtime entitlement, the following diagnostic log appears in Console:

auvaltool: [AUValidation] Failed to load component: Code signature invalid or missing entitlements

I verified that hardware connections are intact and tested across different power sources. What is the verified diagnostic procedure to permanently eliminate this symptom?

MacBook Air 15″ M3 (24GB) | CalDigit TS4 Dock | Kensington Orbit | Kyoto, JP

Enterprise Mac Sysadmin & Jamf Pro Architect | "Verified Apple Discussions Archive"

[William Gibson]

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.

iPad Pro 13″ M4 (Magic Keyboard + Cellular) | iPhone 15 Pro | Antwerp, BE

Apple Certified Support Professional (ACSP) | Digital Nomad & Travel Filmmaker

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