factory floor

Snow Leopard upgrade: Aperture does not start

Directly after installing Snow Leopard, Aperture crashed at every launch attempt. The relevant part of the crash report is:

Dyld Error Message:

Library not loaded: /Library/Frameworks/PluginManager.framework/Versions/B/PluginManager

Referenced from: /Applications/Aperture.app/Contents/MacOS/Aperture

Reason: image not found

It turned out the upgrade silently nuked a bunch of optional Apple frameworks in /Library/Frameworks/, on my machine the PluginManager.framework (required by Aperture) and a bunch of WebObjects related libraries. Restoring /Library/Frameworks/PluginManager.framework with TimeMachine fixed the crash.