Copy both the installer executable and the QtCache folder to a USB drive.
Select the components you need (Qt Creator, Qt Modules, MinGW/MSVC, etc.). Finish Installation: Complete the setup. Note on Missing Components
In the modern era of software development, "always online" has become the default assumption. Package managers, cloud-based IDEs, and just-in-time downloads dominate the landscape. However, for developers working with the Qt framework, the remains an indispensable tool. Qt6 Offline Installer
The choice between online and offline installation primarily depends on your specific requirements:
The installer may ask for a Qt account, even if you are installing offline. You may need to bypass this if a "Skip" option is available or use commercial credentials. Copy both the installer executable and the QtCache
Choose your target Operating System (Windows, macOS, or Linux).
The provides the critical feature of complete environment reproducibility for air-gapped or restricted network development . Note on Missing Components In the modern era
Select where to install Qt (e.g., C:\Qt or /opt/Qt ).
: Essential for high-security sectors like defense, aerospace, or medical, where development machines are often disconnected from the public internet.
An offline installer is a standalone software package that contains all the necessary components for installing Qt on your system during the installation process. Unlike its online counterpart, which downloads components on demand, the offline installer is a self-contained binary—typically a .exe file on Windows, or a similar executable on Linux and macOS—that bundles everything you need for a complete installation.
sudo apt-get install build-essential libgl1-mesa-dev libxcb-util-dev libz-dev