[MacOS] ICON not showed in Sierra computers

[Juan Garcia]

I'm generating a new app that have as target MacOS. I'm setting the app icon using this in my .pro file:

    ICON = $$PWD/images/Myapp.icns

Also, I'm setting that:

   QMAKE_MAC_SDK = macosx10.13
   QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.12

I'm building using XCode 8.3.3 over MacOS High Sierra. The issue is that icon appears in Dock, Launchpad and Applications folder in High Sierra computers but not in Sierra computers. I have check that .icns is in Resources folder of the bundler and Info.plist contains information about CFBundleIconFile:

<key>CFBundleIconFile</key>
<string>myAppImage.icns</string>

How I can solve this issue in Sierra. I have to say that I previously have installed debug versions in the same Sierra computer that didn't have icon set. Any cache issue with applications and icons?

Thanks in advance.