- Delete the following files:
~/Library/Caches/AudioUnitCache/com.apple.audiounits.cache
~/Library/Preferences/com.apple.audio.InfoHelper.plist
~/Library/Preferences/com.apple.audio.SandboxHelper.plist -
Run these commands in your terminal:
killall -9 cfprefsd
killall -9 AudioComponentRegistrar -
Make sure Logic is running within Rosetta:
Right-click on the Logic icon in your application folder -> "Get Info" -> enable the "Open Using Rosetta" option. -
Re-launch Logic Pro X.