Sandboxing AU plugins


I'm wondering if anybody has successfully been sandboxing Juce plugins yet? I experiemented with the 3.0.5 JuceDemoPlugin (building with OS X SDK 10.9), I added the sandboxSafe true flag to the Info.plist file as described in TN2247, but this seems to have made no difference to the way Garage Band 10.0.2 treats it (it still says the secuirty settings need to be lowered to load the plugin). Am I missing a key step?




-- Edit: I added the entry to the main part of the plist, not the AudioComponents section which gets deleted by the port-build script.