macOS Sierra + Qt 5.6.2 = ApplePersistenceIgnoreState issue?



  • Hi,

    I have recently upgraded to Qt 5.6.2 and I don't know whether it is directly to it, but on macOS, my application now shows a message like this one:

    2016-10-13 16:14:32.843 OpenCOR[3340:929508] ApplePersistenceIgnoreState: Existing state will not be touched. New state will be written to /var/folders/bp/8jz3rpfx5c91z2qgx7jfv9180000gn/T/ws.opencor.2016-10-13.savedState
    

    I initially thought that it might have something to do with macOS Sierra, so I decided to try the previous version of my application (which was compiled using Qt 5.6.1) and everything is fine, i.e. I am not geting that ApplePersistenceIgnoreState related message.

    If I then go back to my Qt 5.6.2 based application, the message is back...

    Any ideas anyone?

    Cheers, Alan.

    P.S.: FWIW, I have googled for a solution and came across this, but even if their 'fix' could be applied to my situation, this is clearly not something that I am willing to ask my users to do...



  • Hmm, I have just realised that a possible culprit could be Xcode 8, to which I have also upgraded lately...


  • Lifetime Qt Champion

    Hi,

    You can find here the use of ApplePersistenceIgnoreState.

    And here how to shut off the message here.



  • I must be missing something because I cannot find anything using your first link.

    As for your second link, it is the one I mentioned in my P.S., and it corresponds to what I don't want to have to do that to shut off that message. It's just not a neat solution. I mean that an end-user shouldn't have to enter that kind of a command at the terminal.



  • Oops, my bad regarding your first link. I had originally done a search for ApplePersistenceIgnoreState on that page, but it hadn't returned anything, but it does now. Not sure what happened!

    Anyway, in the end, I think I might be able to apply the solution in the second link, this directly from my application. Will check that tomorrow...



  • It looks like ApplePersistenceIgnoreState might (only?) be for debugging purposes. Hmm, I am pretty certain that I was running the debug version of my application when I got that message. I am therefore wondering whether I will still get it with the release version of my application... (Sorry, thinking aloud here... :))


  • Lifetime Qt Champion

    Not a bad idea to share your thinking, it's a valid check.

    Can you also test whether you have the same happening with 5.6.1 ?

    There might be something that changed with Sierra or Qt 5.6.2.



  • With regards to Qt 5.6.1, I did try with the previous (release, not debug) version of my application (which was indeed built using Qt 5.6.1), and it didn't generate the aforementioned ApplePersistenceIgnoreState message.

    All I think I know at this stage is that (on macOS Sierra):

    • Release w/ Qt 5.6.1 = fine.
    • Debug w/ Qt 5.6.2 = not fine.

    I can definitely try Release w/ Qt 5.6.2, but it would be a bit tedious to try Debug w/ Qt 5.6.1 since I upgraded to Xcode 8 and Qt 5.6.1 is known not to work with Xcode 8 out of the box.



  • Hmm... not sure how and/or why, but (after having restarted my MBP) everything is now fine... In other words, I am not (for now at least) getting that ApplePersistenceIgnoreState message anymore...



  • FWIW, I now simply have this at the beginning of my main() method, thus 'fixing' my original problem:

    #ifdef Q_OS_MAC
        QProcess::execute("defaults",
                          QStringList() << "write"
                                        << "ws.opencor"
                                        << "ApplePersistenceIgnoreState"
                                        << "NO");
    #endif
    
    

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