I'm developing for iMac. The error shows up in the same place in my code every time I build. I've looked for something that might relate in my code and could never get to restoreount.plist. The message disappears after some delay and the app still runs. Still testing.

Thanks for the comment about Log Noise. I recently was able to identify a dangling menu item action in Main after an update that let me see the action instead of naming it "private". This is the only error message I have been able to use after years of coding. Otherwise I test, ignore and wait for somebody to clean it up. Keep up the good work. Thanks for giving it a name.