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How can I disable the Screen Saver on the login window?

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migrated from Jan 13 '11 at 16:36

This question came from our site for professional and enthusiast programmers.

-1, the accepted solution is unclear. It should indicate what to place in the plist file. – Gili Nov 18 '12 at 6:18
The accepted solution should be the one proposed by Kurt. – Mike Kormendy Dec 31 '15 at 19:01
up vote 4 down vote accepted

You can edit the .plist file at /Library/Preferences/ either using a text editor, Plist Editor (requires the OS X Developer Tools) or the defaults command in Terminal to remove the screensaver at login window.

Like this:

sudo defaults write /Library/Preferences/ loginWindowIdleTime 0
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how to edit it there? what to add, or what to set, or what to delete? – Oleg Danu Jan 21 '11 at 7:09
What does your file have in it? Can you post the contents to Pastie? For what its worth, using defaults to read my file returns this and I don't ever get a screensaver. Note however that I'm running 10.6.6, so if your file uses the old (XML) style of .plist, don't sweat it. You could just try trashing the file too. – Just Jake Jan 21 '11 at 7:16
-1, doesn't work for me under Mountain Lion. – Gili Nov 18 '12 at 6:13
The file is a binary plist file (under 10.8 anyway) and to be edited with a text editor must first be converted using plutil -convert xml1 /Library/Preferences/ Then the file can be edited and the screen saver changed. – Josh Mar 10 '13 at 13:26

I believe this does the trick (at least it seems to have worked for mefor several hours now):

sudo defaults write /Library/Preferences/ loginWindowIdleTime 0

This disables the screensaver in the loginwindow.

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I believe this should be the answer since I always use it on my servers. – bloudraak May 20 '13 at 7:43

It isn't possible to disable the login screensaver in Mountain Lion due to a bug. According to the best you can do is log into root's screensaver settings and change it to Message which uses less resources.

See for how to do that.

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The problem is that the login screen is not the result of the screen saver, I lock my Mac when I go out. The screen saver appears by itself, even if it is disabled from SysPref.

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Clarification comments should not be added to the proposed list of answers. The original question should be modified to address additional conditions so as to produce the most succinct answers. – Mike Kormendy Dec 31 '15 at 19:03

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