1. qt-mac-opensource-4.5.3.dmg from http://qt.nokia.com/downloads/mac-os-cpp

2. install

3. command

cd /Developer/Tools

sudo ./uninstall-qt.py
Password:
removing package docs
docs is not installed, skipping.
removing package headers
headers is not installed, skipping.
removing package examples
examples is not installed, skipping.
removing package plugins
plugins is not installed, skipping.
removing package tools
tools is not installed, skipping.
removing package libraries
libraries is not installed, skipping.
removing package debuglibraries
debuglibraries is not installed, skipping.
removing package translations
translations is not installed, skipping.

4. command

ls -lt /Library/Frameworks/
total 0
drwxrwxr-x 7 root admin 238 15 Nov 16:20 Qt3Support.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtCore.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtDBus.framework
drwxrwxr-x 8 root admin 272 15 Nov 16:20 QtGui.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtNetwork.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtOpenGL.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtScript.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtScriptTools.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtSql.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtSvg.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtWebKit.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtXml.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 QtXmlPatterns.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:20 phonon.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:19 QtAssistant.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:19 QtDesigner.framework
drwxrwxr-x 6 root admin 204 15 Nov 16:19 QtDesignerComponents.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:19 QtHelp.framework
drwxrwxr-x 7 root admin 238 15 Nov 16:19 QtTest.framework

... 

Compare: http://bugreports.qt.nokia.com/browse/QTBUG-4910

> Tools # ./uninstall-qtsdk.py

> Customer reported this as happening on 4.5.0 but I have personally seem this occurring on 4.5.3 and 4.6.0
> I have worked around this by manually removing all the Qt directories