When using a dummy VGA projector, some of the software does not appear on my built-in retina screen
I assume you use the VGA dummy as a secondary monitor, and most likely you have it configured as your primary monitor. Try this: Open Preferences -&gt; Monitors -&gt; Arrange and drag-n-drop the menu bar to your built-in retina display. Alternatively, you can choose to mirror your screen onto the (non-existent) external monitor, which should absolutely fix the issue.