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On Mac OS you can lock your system using CTRL+Shift+Eject button. But when I do that the background image is empty or blank. How can I set a background image on locking Mac ?.

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As an alternative, consider starting the screen saver instead. You might be able to find one (or create a new one) that simply displays an image, not movement at all. – Daniel Beck Mar 11 '11 at 5:09
up vote 3 down vote accepted

This command puts the display to sleep. There's no way to display an image with the display turned off.

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True! (Though I assume that when requiring a password after sleep, the login screen will show?) – Arjan Mar 10 '11 at 18:26
@Arjan It doesn't seem possible. – Daniel Beck Mar 10 '11 at 18:35

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