Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
Env : Qt Creator 4.5 based on Qt 5.10.0 (Clang 7.0 (Apple), 64bit)
In case light mode, active(focus) tab label QTabWidget shows no caption. If it has no focus, it's ok. The same goes all Qt mac sw (Google Earth, ...) including my mac SW.
See https://bugreports.qt.io/browse/QTBUG-85940