How to create a window login banner in OS X

In Mac OS X, you can display a banner at the login window that requires all users to acknowledge before login into the system, such as a user access policy.

Use the following steps to create a login banner.

- Start “
TextEdit” and create your document with text and images.
- Save your document as “
PolicyBanner.rtfd” (rich text format directory: this format supports pictures in the text file)

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When you are done creating your banner, press “shift++G” to open the Finder “Go To Folder” window and type “/Library/Security/“ and click the “Go” button.

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Copy your “PolicyBanner.rtfd” file.

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When you file has been copied, start the “Terminal” and type the following command to allow all users to read and execute your file.
sudo chmod -R o=rx /Library/Security/PolicyBanner.rtfd
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Now, you can log out from your Mac and you will see the Login Policy Banner.