How do I show TMainMenu on Firemonkey form when Form.BorderIcons.biMaximize is false? When I set it to false, MainMenu doesn't show up... and when it is set to true, it does.
Yes, this does not appear to work when biMaximize, biMinimize or biSystem are False. It looks like a bug to me. Although I suppose it could be by design. If I were you I would submit a bug report.
In the meantime, use a TMenuBar component instead.