On any Mac operating system, text editing shortcut keys do not work. (E.G., Cmd+C, Cmd+X, Cmd+V do not copy, cut, or paste, respectively.) Instead, if you want to copy or paste text to or from a field, you have to use Control+X, Control+C, or Control+V. These are the standard shortcut keys on other operating systems, but on the Mac the modifier key should be Cmd.

This can be fixed if you use Toolkit.getDefaultToolkit().getMenuShortcutKeyMask() instead of KeyEvent.VK_CONTROL.