Added support for reading and writing OpenDocument Format (ODF) files. Installation Guidelines
Official binaries and source code for this version are no longer available on the main download pages but can be found in the following official Qt archive locations : download qt 4.5.0
If you are looking for the IDE specifically, it is archived separately under Qt Creator Archives . Key Features of Qt 4.5.0 Added support for reading and writing OpenDocument Format
Downloading and installing Qt 4.5.0 is primarily done through the , which hosts historical releases for legacy development. This version, originally released in March 2009 , introduced significant changes including the LGPL licensing option and the first-ever Qt SDK . Where to Download Qt 4.5.0 This version, originally released in March 2009 ,
A major rewrite for macOS allowed Qt applications to run as native 64-bit Cocoa applications.
Introduced a pluggable graphics system allowing developers to choose between raster , OpenGL , or native engines for better performance.
Available in .tar.gz , .tar.bz2 , and .zip formats for building from scratch on any platform.