I recently downloaded the Public Beta of macOS Sierra, and everything is working perfectly - except that one application won't launch. macOS draws a large banned / not allowed sign through the icon (see image), and when clicked displays a dialog saying:

You can’t use this version of the application “Fraise.app” with this version of macOS.

enter image description here

This is interesting as it was not a PowerPC application - I have upgraded from El Captain (where the application worked fine), not some ancient system such as Mac OS X Leopard.

I can't seem to find any information online about such a problem, nor can I understand why it is occurring. OS updates normally do not stop previously working apps from running unless there is a very significant change in architecture - which there is not as far as I'm aware.

So, my question is: why is this happening, and is there anything that I can do to get the app running again?

Also, I know it is beta software, and that there are all sorts of bugs / problems / risks involved in running it, which could explain this. The application is not vital to my workflow, nor am I using my main computer to run the beta. I am more just interested in why this is happening then if there is a fix.

  • First thing I'd do is ask the developers of 'Fraise'. They might already be aware & know a fix/workaround. – Tetsujin Jul 20 '16 at 16:00
  • Do you see anything in the Console utility's "All Messages" log stream when you launch it? For example, if you saw a message from dyld about a library not found, that would indicate it uses an old library that is no longer included in macOS. – Spiff Jul 20 '16 at 17:05
  • 'Fraise' is no longer in development, which is unfortunate because it was a good text editor. I opened up the console and did a search for dyld, with 0 results, so it can't be that. I also took a look when trying to open the app, and the only results which seem mildly related are listed as <private> from the process DuetHeuristic-BM (com.apple.duetactivityscheduler) - these listings only appear when trying to open the app. – Toastrackenigma Jul 21 '16 at 4:45
  1. Choose “Show Package Contents” in the context menu.
  2. run Contents/MacOS/Fraise

I assume that the error will be "Objective-C garbage collection is no longer supported.". It seems that Apple is no more supporting those old apps with "garbage collection with macOS 10.12.

Delete my answer if you don't like it and don't ask why I won't post anymore.

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  • 3
    Yeah, Garbage Collection is definitely the problem here. Happily, Fraise was open source, so I'm working on creating a new version using ARC instead. Thanks for your answer though! – Toastrackenigma Sep 21 '16 at 5:11

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