The Mac Mirror Flip Utility is a simple but powerful program that mirror flips any window on your Mac. Here’s how it works: simply press the hotkey to to flip your current window, and when you want to unflip it you can do so with the same hotkey. This allows you to use your favorite software as a teleprompter, such as MS Word, PowerPoint, or any text editor or web browser. It’s also great for heads-up-displays, Zoom meetings, Pepper’s Ghost illusions, and more.

Simple Instructions:

First, run the utility, then switch to any program you want to create a mirror image of. Press the control-option-command-M hotkey and it will flip. Press the hotkey again to switch back to normal. You can update the hotkey in program preferences to anything you like.

New Version (Released June 2nd, 2021)
Download Mirror Flip Mac Utility (zip file)

Old Version (For MacOS Before “Big Sur” Update)
Download Mirror Flip Mac Utility (zip file)

Installation Tips:
Note that you have to enable Screen Recording in Security & Privacy -> Privacy

How to open apps that aren’t from Mac App Store

By default macOS allows you to open apps from the official App Store only. If you have this still set as your default you will be seeing the warning when you try to open an app for the first time.

Luckily you can make a simple change to your settings that will allow you to open some third-party apps that aren’t on the App Store. It won’t mean that you can open every third party app without issue, but it will certainly mean you see fewer warnings.

1. Open System Preferences.
2. Go to the Security & Privacy tab.
3. Click on the lock and enter your password so you can make changes.
4. Change the setting for ‘Allow apps downloaded from’ to ‘App Store and identified developers’ from just App Store.

You’ll still be prevented from opening anything macOS doesn’t recognize, but at least you will be able to open apps that weren’t purchased from the App Store, assuming that they don’t have malware and they are signed by a developer Apple recognizes and trusts.