ADDITIONAL SYSTEM INFORMATION :
macOS 14.4.1

A DESCRIPTION OF THE PROBLEM :
If this code is used, many menu item accelerators (e.g. Cmd-S) do not trigger the item's action:

            if (app.isSupported(Desktop.Action.APP_MENU_BAR)) {
                Desktop.getDesktop().setDefaultMenuBar(menuBar);
            } else {
                setJMenuBar(menuBar);
            }

If this is used instead, menu item accelerators do work:

        System.setProperty("apple.laf.useScreenMenuBar", "true");
         setJMenuBar(menuBar);


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Create a project with this file
2. Run it on macOS.
3. Press Cmd-Delete. Nothing is printed to the console.
4. Set `fixed = true` on line 11.
5. Run.
6. Press Cmd-Delete. "Delete pressed" is printed to the console.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The menu item's action should be triggered.
ACTUAL -
The menu item highlights, but the action is not triggered.

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CUSTOMER SUBMITTED WORKAROUND :
Use:

System.setProperty("apple.laf.useScreenMenuBar", "true");
setJMenuBar(menuBar);

instead of:

Desktop.getDesktop().setDefaultMenuBar(menuBar);

FREQUENCY : always