Install Qt Creator
From MNE-CPP Wiki
You can either download (Select "View All Downloads") and install Qt Creator using the binaries directly, or you can build Qt Creator by your self by downloading and compiling the source code. The source code is available as a zip (29 MB) or a tar.gz (22 MB).
To compile the Qt Creator do the following:
Windows
qmake –recursive nmake nmake install INSTALL_ROOT="C:\Qt\qt-creator-3.2.2"
Linux
qmake –recursive make make install INSTALL_ROOT=/path/to/your/Qt/qt-creator-3.2.2
Mac OS X
qmake –recursive make make install INSTALL_ROOT=/path/to/your/Qt/qt-creator-3.2.2