Qt 5152 Offline Installer ^new^

The "Elephant in the Room": Commercial vs. Open Source

The most critical thing to know about the Qt 5.15.2 offline installer is that it is no longer available for free public download.

• The Policy Change: Starting with Qt 5.15, The Qt Company changed their distribution model. They restricted offline installers to commercial license holders only.
• The Result for Open Source Users: If you are a hobbyist, student, or open-source developer looking for that specific .dmg, .exe, or .run file on the official Qt downloads page, it is not there. The open-source download page only offers online installers or source code archives.

2. Downloading the Offline Installer

7. Common Pitfalls & Solutions

| Problem | Solution | |---------|----------| | Installer asks for login | Disconnect network – it falls back to offline mode for open-source (works for 5.15.2) | | Missing MinGW compiler | Install separately from MinGW-w64 or use MSVC | | No webengine for MinGW | QtWebEngine requires MSVC on Windows – use MSVC kit | | macOS “damaged” error | xattr -d com.apple.quarantine qt-opensource-mac-x64-5.15.2.dmg | | Linux no OpenGL | Install libgl1-mesa-dev, libxcb-util1-dev |

5. Advanced: Custom Scripted Installation (Qt Installer Framework)

Create a control_script.qs to skip Qt login and auto-select components: qt 5152 offline installer

// control_script.qs
function Controller() 
    installer.autoRejectMessageBoxes();
    installer.setDefaultPageVisible(QInstaller.Welcome, false);
Controller.prototype.WizardPageCallback = function(page) 
if (page.name === "LicenseCheck") 
page.QtLicense = "LGPLv3";
page.acceptLicense();
if (page.name === "ComponentSelection") 
page.deselectAll();
page.selectComponent("qt.qt5.5152.gcc_64");
page.selectComponent("qt.tools.qtcreator");

Run:

./qt-opensource-linux-x64-5.15.2.run --script control_script.qs

Problem 2: WebEngine fails to build on macOS

Solution: Qt 5.15.2's WebEngine requires an older Xcode toolchain. Use open -a Xcode and agree to license terms. Alternatively, skip WebEngine during component selection if you don't need a Chromium browser. The "Elephant in the Room": Commercial vs

4. Installing on Linux

chmod +x qt-opensource-linux-x64-5.15.2.run
./qt-opensource-linux-x64-5.15.2.run

• GUI installer appears.
• Choose “Skip” for Qt account (if available).
• Select install path, e.g., /home/user/Qt5.15.2.
• Components: select Desktop gcc 64‑bit and Qt Creator.
• After install, add to PATH:

export PATH=/home/user/Qt5.15.2/5.15.2/gcc_64/bin:$PATH

• Also set CMAKE_PREFIX_PATH if using CMake.

3.3 Checksum verification

Example SHA256 (Windows):

ff3b16e9c450e8f45ae4bae9e5838d12a6fa3d3b4f5d1d3d4e9f4d5e6d7e8f9a0  qt-opensource-windows-x86-5.15.2.exe

(Replace with actual published checksum – always fetch from .md5 or .sha256 files on the mirror.) The Policy Change: Starting with Qt 5

4.3 macOS (.dmg)

• Open .dmg, drag Qt folder to Applications.
• The installer is actually a wizard – same component choices as Linux.

Alternative command-line:

hdiutil attach qt-opensource-mac-x64-5.15.2.dmg
sudo installer -pkg /Volumes/qt-opensource-mac-x64-5.15.2/qt.pkg -target /