During component selection, choose macOS (Clang) kit.
and build it manually if you need an air-gapped installation. How to Install Qt 5.15.2 (Open Source) qt 5.15.2 offline installer
The status of the has changed significantly due to licensing shifts by The Qt Company. As of 2020, open-source offline installers are no longer provided for versions 5.15 and later . Availability Overview During component selection, choose macOS (Clang) kit
It includes mature modules like Qt WebEngine, Qt Quick, and extensive 3D support. How to Get the Qt 5.15.2 Offline Installer During component selection
You might be wondering: Why not 5.15.3 or 6.5?