Mark Your MacBook as a Security Measure
Put your brand on your laptop. Your MacBook deserves some sort of identifying information! Sure, this can be as simple as a fine-point Magic Marker on the bottom of the laptop — or an engraving tool for metal surfaces, which works well for the aluminum unibody MacBook Pro — or you can affix a permanent metal tag.
Forget the old standby, a business card taped to the bottom of the case. Your MacBook needs a more permanent brand. After all, most of the people in the world are honest, and you might not need that tracking software. You might leave your laptop somewhere by accident, and someone would like to return it to you. (Don’t forget to offer a reward!)
Some laptop owners will want to include their name, address, and other contact information, whereas other Road Warriors might feel more comfortable with just their name and e-mail address. Whatever you choose, branding your laptop is as important as backing it up.
Although displaying a message with your contact information on the Login screen is not quite as effective as branding your MacBook, it can help an honest person return your missing laptop all that much faster!
To type a display message, click the System Preferences icon in the Dock and click the Security & Privacy pane; then click the Show a Message When the Screen is Locked check box to enable it. The text you type in the box will be visible whenever the Login screen is shown.