I found a solution. Here is a step by step guide on how to install QWT 6.1.0 under Mac OS X and get it running inside the QT-Creator :
- Download the .tar.bz2 from here http://sourceforge.net/projects/qwt/files/qwt/6.1.0/
- Extract it where you want, for Example inside your Download-Folder
- Then change into the directory qwt-6.1.0
- Then you have to locate the qmake command line tool ( you can do so by simply searchng for it inside the Finder.
- Then qmake the qwt.pro File like /Applications/QT/5.1.0/clang_64/bin/qmake qwt.pro
- make
- sudo make install
- Inside your QT Project you have to add the following line to the .pro File include ( /usr/local/qwt-6.1.0/features/qwt.prf ) includes QWT libary into Project
- Now you have to create a softlink like this : sudo ln -s /usr/local/qwt-6.1.0/lib/qwt.framework/qwt /usr/lib/qwt
Thats it. QWT now should work.
UNDER MAVERICKS:
If you are using Mavericks you have to manually copy the qwt.framework to Libary/Frameworks folder for not getting the "dyld: Library not loaded: libqwt.6.dylib" error .. i dont know why but it works.