Problem opening Qt5.5.1 app on OS X 10.6.8

[Eric Lundberg]

I have an application developed with Qt 5.5.1 on a system running OS X 10.10.5. The application will not open for a user attempting to use it on OS X 10.6.8. The problem report states that "App cannot be opened because of a problem." I have deployed the application bundle on my system where it works fine. Are there issues with deploying to 10.6.8 (Snow Leopard)?

[ambershark]

Usually on that "there is a problem" screen on osx, you can get more information. Which is basically like a crash log. Can you post that info here?

Or barring that can you open the application in a debugger and show us the info from that?

And final question, did you limit your target osx platform when you built? Something like:

QMAKE_CFLAGS += -mmacosx-version-min=10.6
QMAKE_CXXFLAGS += -mmacosx-version-min=10.6

Or did you use something like:

macx:QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.6

in your project file? ^ had to look that one up, I use cmake these days and couldn't remember the syntax.

[sandy.martel23]

10.6 support was drop, I think Qt 5.3.2 is the last version to support it.

[SGaist]

10.6 was dropped as a build platform however applications should be able to run on it (provided that no API from newer version of OS X are used)

[sandy.martel23]

@SGaist said:

...(provided that no API from newer version of OS X are used)

That's exactly what happen, newer API are now used unconditionally and 10.6 fallback has been removed.

see:
a198ce8d8fe9b418d631d033d481ec38f0373fa4
fc11798e8f5997dd350a9baf39e9a3124b04fdd1
9c92a18b975173383454c13d34f4438636f0450c
etc

That was for Qt5.4, so like I said, stick with Qt5.3.2 for 10.6 support.

[SGaist]

Fair enough, then the documentation is not reflecting that move.

[Eric Lundberg]

I went back to version Qt5.3.2 and now the app developed with it on a recent OS X runs on OS X 10.6.8. Thanks for the advice.