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

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Home › Forums › Logic Pro, Final Cut Pro & Pro Apps › [Solved] Mac mini M4 Pro encountering Audio Unit (AU) Validation Crash on Launch in Logic Pro Plugin Manager after update (macOS Sequoia 15.1) › Reply To: [Solved] Mac mini M4 Pro encountering Audio Unit (AU) Validation Crash on Launch in Logic Pro Plugin Manager after update (macOS Sequoia 15.1)

November 14, 2026 at 11:04 pm #14128
William Gibson
Certified Tech (Lvl 5)
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.

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