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Click the System Preferences icon on your Dock. Alternatively, you can click on the Apple icon in the top left of your screen and then click “System Preferences.”
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Click Security & Privacy. It will be located under the heading “Personal.”
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Click the lock in the bottom left of window. Enter your password when prompted. Then, click Unlock.
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Click the box next to “Anywhere.” This will be located in the “General” Section, under “Accept Applications Downloaded From: “. You will now be able to install your software as normal. Click the lock again if you wish to prevent further changes.