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I’ve updated to High Sierra, now the DAW crashes or I can’t activate the licenses

Upgrading to High Sierra (macOS 10.13) may break Logic Pro X, Main Stage, Garage Band, or other DAWs.

Symptoms:

  • Plugins can’t validate the license file
  • Plugins crash or hang the DAW while scanning or loading a session
  • Presets, channel strips, and templates can’t be saved or loaded

Cause:
If you upgraded from Logic Pro 9 to Logic Pro X prior to the upgrade to High Sierra, chances are that your “Audio Music Apps” folder is broken.

Fix:

  • Quit Logic Pro X, Main Stage, or Garage Band.
    • Go to your “Music” folder in your user home. If you find an alias to “Audio Music Apps”, delete it.
    • Create the folder “Audio Music Apps” inside “Music”, you should have this structure:
      Macintosh HD / Users / “your user home” / Music / Audio Music Apps
    • Open Terminal (you can find it in /Applications/Utilities/) and paste this:
      open /.HFS+\ Private\ Directory\ Data?/
    • Copy/move the content you’ve found with the Terminal into the newly created “Audio Music Apps” folder.
    • Restart your Mac just in case.