Apple Logic Pro 8 - Manual (Page 253)

Chapter 10 Working With Instruments and Effects 253
To open the Audio Units Manager:
m Choose Logic Pro > Preferences > Audio Units Manager in the main menu bar (or use
the Start Audio Units Manager key command).
The results of the test are shown in the Compatibility column.
Important: The first thing you should do is check the manufacturer’s website for
updated versions of Audio Units plug-ins that fail validation.
Manually Enabling Plug-ins
Audio Units plug-ins that failed the validation test, can be manually enabled by
activating the checkboxes in the Logic and Nodes columns—but be aware that these
plug-ins can cause problems.
If you encounter problems with manually activated failed plug-ins, click the Disable
Failed Audio Units button.
Warning: Use of plug-ins that have failed the validation can negatively affect the test
results of subsequently scanned plug-ins. They can also prevent Logic Pro from
launching, cause it to quit unexpectedly, or even lead to data loss (destroyed project
files)!