i try to use the Toolbar as Tabsheet, but somehow it does not work like it should. toolbarSelectableItemIdentifiers seem to be implemented correct, so it should be fine if i do something like:
TMSFMXNativeNSToolbar1.ToolBar.setSelectedItemIdentifier((Sender as TTMSFMXNativeNSToolBarItem).GetID);
The current version 1.0.1.0, released yesterday contains a SelectedItemIndex property that you can use to select an item in the toolbar. The Item Option property needs to be set to ioSelectable.