【QT】Installer requires Xcode Version 5.0.0 for Qt download if toolchain not found

When I install QT in MacOS 11.3.6, it prompts I need to install xcode

then I install xcode but it was still fruitless.

now, it's the solution:

referrence：

https://www.jianshu.com/p/5a6b7fcdf4c3