Eric4

Qt 4

get qt4-mac sources here: ftp://ftp.trolltech.com/qt/source/qt-mac-opensource-src-4.3.1.tar.gz and compile/install:

 tar xvzf qt-mac-opensource-src-4.3.1.tar.gz
 cd qt-mac-opensource-src-4.3.1
 ./configure -prefix /usr/local/qt-4.3.1 -universal
 make
 sudo make install

note: there is a Qt 4 binary which you can get here: ftp://ftp.trolltech.com/qt/source/qt-mac-opensource-4.3.1.dmg and install by double-clicking. however, i didn't figure out how to install QScintilla using this binary version.

QScintilla 2

get QScintilla 2 here: http://www.riverbankcomputing.com/Downloads/QScintilla2/QScintilla-1.73-gpl-2.1.tar.gz

 tar xvzf QScintilla-1.73-gpl-2.1.tar.gz
 cd QScintilla-1.73-gpl-2.1/Qt4
 qmake qscintilla.pro 

then doubleclick on qscintilla2.xcodeproj and click 'build' in xcode.

sip

get sip here: http://www.riverbankcomputing.com/Downloads/sip4/sip-4.7.1.tar.gz

 tar xvzf sip-4.7.1.tar.gz
 cd sip-4.7.1
 python configure.py -n
 make
 sudo make install

PyQt 4

get PyQt 4 here: http://www.riverbankcomputing.com/Downloads/PyQt4/GPL/PyQt-mac-gpl-4.3.1.tar.gz

 tar xvzf PyQt-mac-gpl-4.3.1.tar.gz
 cd PyQt-mac-gpl-4.3.1.tar.gz
 python configure.py -a
 make
 sudo make install

QScintilla 2 python bindings

you hav to cd into the Python subdirectory of the QScintilla 2 source directory (see above):

 cd QScintilla-1.73-gpl-2.1/Python

now you can build the python bindings:

Eric 4

get eric 4 here: http://dl.sourceforge.net/sourceforge/eric-ide/eric4-4.0.2.tar.gz

 tar xvzf eric4-4.0.2.tar.gz
 cd eric4-4.0.2
 sudo su
 export DYLD_FALLBACK_LIBRARY_PATH=/usr/local/Qt-mac-free-3.3.8/lib
 python install.py

start eric:

 eric4