Qt 4.8.7 Fixed

Many industrial machines, medical devices, and automotive interfaces were built on Qt 4. Changing the framework in these environments requires massive re-certification and testing. For these systems, "if it isn't broken, don't fix it" is the golden rule, and Qt 4.8.7 is the most stable version they can run. 2. Massive Legacy Codebases

wget https://download.qt.io/archive/qt/4.8/4.8.7/qt-everywhere-opensource-src-4.8.7.tar.gz

Note: QT += widgets is ignored in Qt 4 – keep it for minimal cross-compatibility. qt 4.8.7

One of the main drivers for this release was ensuring that legacy Qt apps continued to run smoothly on newer versions of macOS (then OS X).

Because it is a legacy version, using it today often requires specific workarounds: Because it is a legacy version, using it

export QT_DEVICE_PIXEL_RATIO=2

Install Qt Creator 3.5.1 manually:

tar xzf qt-everywhere-opensource-src-4.8.7.tar.gz cd qt-everywhere-opensource-src-4.8.7 ./configure -prefix /opt/qt487 -opensource -confirm-license -nomake examples -nomake demos make -j$(nproc) sudo make install