My Mac won't let me install a program.

Mark Racine Updated by Mark Racine

Sometimes you might receive an error message when trying to open an app that you downloaded from a website that says your Mac will not allow programs from an unidentified developer.

To override your security settings and open the app anyway follow these steps:

  1. In the Finder  on your Mac, locate the app you want to open.
    Don’t use Launchpad to do this. Launchpad doesn’t allow you to access the shortcut menu.
  2. Control-click the app icon, then choose Open from the shortcut menu.
  3. Click Open.

The app is saved as an exception to your security settings, and you can open it in the future by double-clicking it just as you can any registered app.

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