: Get it from the official Qt download page . Run and Log In : You will need a Qt Account to proceed. Select Components : Choose Custom Installation .

Select and choose the Offline Installer for your operating system (Windows, macOS, or Linux). 2. The Open Source Route (Online Installer) download qt 5.15.2 offline installer

However, there are still several ways for open-source users to get this specific version or simulate an offline installation experience. 1. The Official Route (Commercial Users) : Get it from the official Qt download page

: Click the Archive checkbox and hit Filter . This will reveal older versions, including 5.15.2, in the list. 3. Building from Source (True Offline) Download Source Package Offline Installers - Qt download qt 5.15.2 offline installer