My plug-in does not appear in Logic or Garage Band
First, make sure that you have installed the Audio Unit (AU) version of the plug-in. Logic cannot load VST, VST3 or AAX plug-ins. It only supports Audio Units (AU).
Please also make sure that your version of MacOS is supported (check the system requirements of the specific plug-in).
If the plug-in still does not appear in Logic's Audio Units Manager, you may have to clear MacOS and Logic's plug-ins cache:
- quit Logic
- remove the ~/Library/Caches/AudioUnitCache folder
- remove the ~/Library/Caches/com.apple.logic10 folder
- remove the ~/Library/Preferences/com.apple.audio.InfoHelper.plist file
- reboot the Mac
- launch Logic
The plug-in should be back in the list. If it is still not there, you may want to uninstall the plug-in (just move it out of the /Library/Audio/Plug-Ins/Components folder), repeat the steps above, and then re-install the plug-in, reboot and finally get back to Logic/GarageBand.
Also, if you are running an Apple Silicon Mac, please download and install the latest version (or preview) that is natively compatible with M1 processors.
Note: the Library folder is a hidden folder. You can either access it via the command line in the Terminal, or go into (users/username/) in the Finder, then while holding down the option key, click GO in the menu bar at the top of the screen, to select the "secret" library folder.