My app is the client in a client-server document management system. It supports scanning, indexing, and creation of various types documents including PDF, TIFF, various image types, and text. Upon installation of macOS 15.2, I am getting a strange NSInternalInconsistencyException error so long as the following are true:
- I have created or opened a PDF (or other type) document
- I click on the desktop/Finder or other app
Normally, I would expect this action to put my App in the background, but before that happens, the error is thrown. I am not connected any server at the time. My app is built catch unhandled exceptions and this is what is displayed:
At the time the error is thrown, [NSApp mainWindow] appears to be set to nil, but I have no idea if this occurred as result of becoming the background app or because of something I am doing wrong. I never set mainWindow anywhere in my app. I've tried to set a Waitchpoint or various waist try and catch when mainWindow changes, but have come up empty. Note the error is thrown if I hit a breakpoint when debugging in Xcode (because it switches to Xcode).
This errors never occurred with previous releases and does not occur when the app is run under 15.1. The app is written in ObjectiveC.
I've looked at various app-level flags and info.plist properties and nothing I've seen jumps out at me. I strongly suspect this error is a result of some system-level app attempting to create a UserActivity file (perhaps encrypted) that it can store in the cloud (a feature we would rather not use yet). It could also be trying to do an autosave on my open document-based windows - our NIB files that apply to our documents are marked as Restorable and they worked in prior system releases. Turning the Restorable flag off has no effect on the error.
Any clue what I might be missing here? I've spent an embarrassing number of days trying to understand why this is happening.