Currently Being ModeratedOct 1, 2012 6:01 AM (in response to MikeB58)
Mike, check, if your versions of the Nik plug-ins are compatible with Aperture 3.4. To use a plug-in with the latest Aperture release, it need to be sand-boxed and 64-bit compatible. Try to upgrade your plug-ins to compatible versions, if possible.
Are you using MacOS X 10.7.5 or 10.8.2?
Currently Being ModeratedOct 1, 2012 6:19 AM (in response to MikeB58)
Also make sure you restart your computer and repair permissions. I couldn't get the Vignette Panel to work after upgrading but restarting the computer has fixed that. I just tried Color Efex Pro and Silver Efex Pro. Both worked fine.