Solved QPushButton and QComboBox not properly aligned on macOS
It appears as though QHBoxLayout does not vertically align QPushButtons and QComboBoxes properly on macOS. See the following screenshots where the problem is apparent both in Qt Creator and at run-time in the app.
@patrickkidd Which Qt version is it?
Did you try to check for bug reports for such an issue on Qt bug-tracker?
Latest macOS and qt-5.11.0. No dice on bug reports.
Wrong base line alignment for QLabel and QPushButton regarding QLineEdit and QComboBox one.