Apple Logic Pro 9 - Manual (Page 314)

You can see the results of the validation scan (for all Audio Units and “wrapped” VST
plug-ins) in the Compatibility column of the Audio Units Manager window.
Important: The first thing you should do is check the manufacturer’s website for updated
versions of Audio Units plug-ins that fail validation.
To open the Audio Units Manager
µ
Choose Logic Pro > Preferences > Audio Units Manager in the main menu bar (or use the
Audio Units Manager key command).
Manually Enabling Plug-ins
Audio Units plug-ins that fail the validation test can be manually activated by selecting
the checkboxes in the Logic and Nodes columns—but be aware that these plug-ins can
cause problems.
314 Chapter 10 Working with Instruments and Effects