Window Duplicator


Do you know the situation during a presentation, you want to show something to the audience? For example, a Terminal session. Now you have either to expose your whole screen by choosing screen mirroring. This also changes your local layout, very inconvenient. The other choice would be moving the window onto the second display. As most of the time this display is projected behind you, the problem here is that you cannot see what you are typing without contort your body, which is also inconvenient.

Window Duplicator is a helpful Mac OS X which assists you during presentations. You no longer need to expose your screen or contort your body. Just select the desired window in Window Duplicator. A preview is instantly visible only for you. This helps you ensure that this is the right window. For example, if you have multiple instances of the same application open. After you have verified that this is the desired window, just hit play. The selected window is now duplicated onto the second display. Furthermore, the window on the projected screen is adjusted to the screen's size. You can affect the size on the projected screen, by resizing the original window on your screen. A window on the projected display is only scaled down. Scaling it up is up to you.


  • Duplicate window on second display
  • Change the refresh rate of the duplicated window
  • Preview of selected window
  • Launch at login
  • Itemize into the menu bar

What's New

Version 1.1:
  • [FIX] play button is available even without any selection.
  • [ADD] App can be minified into the menubar.
  • [CHN] allow better app nap while Window Duplicator is paused or stopped.

Frequently Asked Questions

Does Window Duplicator work with any window?
Is the duplicated window updated in real time?
No, there is a small delay between the updates. So it is not suitable to play a video.
Does Window Duplicator work without a second display?
The purpose of Window Duplicator is to assist you during a presentation, hence it requires a second display.
The play button is inactive, what is wrong?
Nothing, just attach a second display to you Mac and everything will work fine.
My desired window is not in the list of Window Duplicator?
Most likely you launched the application after Window Duplicator. Just hit the refresh button and the list of available window is updated. You desired window should be there now.
Can I try before I buy?
Yes! There is a special trail version to help you decide whether Window Duplicator does what you need.
I need troubleshooting or have an enhancement request, what to do?
Great, I'm always interested in feedback. In Window Duplicator use the Feedback / Issue reporting item under Help or supply your request here. I try to get back to you as soon as possible.
Can't find the answer you are looking for?