Qt 6.3 Beta testing with macOS (Intel x86_64) - BigSur 11.3.1 - XCode 12.5 - Qt Creator 6.0.2 Jan 18 2022

Test case steps

1. Start Qt Designer from Qt version under testing
2. Create new form
3. Add item(s) in the form
4. Preview form
5. Check Qt Designer version (Help - About Qt Designer)
6. Close the Qt Designer
   Expected outcome
7. Designer can be started without any issue
8. Creation of form succeed
9. You can drag and drop new item to the form without any issues
10. Form preview opens without any issue
11. Version matches to the Qt version under testing
12. Qt Designer can be closed successfully

Actual outcome

1.  Starting from terminal under the Qt installation ../6.3.0/macos/bin/Designer.app/Contents/MacOS/Designer ends to segmentation fault 11