How to disable Gatekeeper in Mountain Lion

If you want complete freedom to install apps that you’ve downloaded in Mountain Lion, you need to disable Gatekeeper.

Gatekeeper is Mountain Lion’s new security feature that ensures that only apps that have been downloaded from the Mac App Store or from Apple approved developers will install on your Mac.

If you don’t disable Gatekeeper, you’ll receive the following warning and the installer will simply close:

However, you can easily disable Gatekeeper so that you can install apps from any developer.

1. Go to the Apple logo in the top left-hand corner of your screen and select System Preferences.

2. Select Security.

3. You may have to unlock your system to change the Security settings by clicking on the padlock in the bottom left corner of the Preferences screen.

4. In the bottom half of the panel simply select Anywhere and then confirm the security exception by clicking Allow From Anywhere and you’re done.