Symptom
When opening Final Cut Pro 3 an alert box with this message appears:
"One or more unsupported enabler files are installed. Blue render bars will appear in the Timeline to indicate areas of real-time playback that may drop frames as a result of this non-standard configuration."
Solution
Delete the Jog Enhance plug-in file which is located in the following location-
Final Cut Pro 3.0 : Plugins : Jog Enhance
The feature performed by this plug-in is part of Final Cut Pro 3.0 and later.