Aperture 3.4 and later: Some third-party plug-ins are no longer compatible
The App Sandbox is one of the security features of OS X Lion v10.7.5 and OS X Mountain Lion v10.8. It isolates apps from critical system components of your Mac, your data, and other apps in order to keep your Mac more secure from malicious software.
Plug-ins that do not comply with the requirements of app sandboxing may not operate properly with Aperture 3.4 and later. When attempting to use an affected plug-in, you may be presented with an alert dialog. In some cases, you may be able to dismiss the alert message and use the plug-in anyway. In other cases, the plug-in may have no effect, or may cause Aperture to quit unexpectedly.
In order to comply with the requirements of app sandboxing, some Aperture plug-ins may need to be updated by the developer. If you encounter a plug-in that no longer operates properly when you use it with Aperture 3.4, contact the developer of the plug-in directly and ask when a version compatible with app sandboxing will be available.
Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Risks are inherent in the use of the Internet. Contact the vendor for additional information. Other company and product names may be trademarks of their respective owners.