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Question Why are my plug-ins not showing up in Logic 9

Answer
Please note: The latest PowerCore software offers 64-bit driver support but contains 32-bit plug-in binaries only.  Start Logic 9 in 32-bit mode (Select the Logic icon in the applications folder and press either Apple+i or right-click 'Show Information'). In the Information window, check the "Open in 32-bit mode" checkmark). It will then scan any new 32-bit AUs. Once this is done (and assuming the AU passed validation) it may then be accessed with the 32-bit Audio Unit Bridge running Logic 9 in 64-bit mode.