How to make Garage Band rescan Audio Units...
Fianly found the solution to get Garage Band to rescan the audio units...
If GB finds a bad audio unit, it lists it as not compatable. If you fix the bug in the audio unit, Garage Band still refuses to load it. I have had this problem with Native Instrument devices like Kontakt. They developed a bug which was later resolved and GB would never list it as available after it was working. Bad news which others have experienced.
This solution worked for Garage Band 4.0, not sure if it is the same with earlier versions.
SOLUTION:
Remove file: com.apple.audiounits.cache
In folder: ~/Library/Caches/
The "~" refers to your home folder name. If you remove this cache file, then launch Garage Band, it will rescan all audio units and test them for compatability and show all the accepted ones.
Whew... took me three days of looking, good luck
If GB finds a bad audio unit, it lists it as not compatable. If you fix the bug in the audio unit, Garage Band still refuses to load it. I have had this problem with Native Instrument devices like Kontakt. They developed a bug which was later resolved and GB would never list it as available after it was working. Bad news which others have experienced.
This solution worked for Garage Band 4.0, not sure if it is the same with earlier versions.
SOLUTION:
Remove file: com.apple.audiounits.cache
In folder: ~/Library/Caches/
The "~" refers to your home folder name. If you remove this cache file, then launch Garage Band, it will rescan all audio units and test them for compatability and show all the accepted ones.
Whew... took me three days of looking, good luck
Macpro 2.66, Mac OS X (10.4.10)