Where can I get a "black screen" screensaver for OS X Lion?

I uploaded this for you, you can download the screen saver file here.

If you want to do it manually, do it like this:

• Open Quartz Composer.app. This is no longer ships with Xcode by default. You need to install Xcode first and then download the Graphics Tools for Xcode. Be sure to download the appropriate version. I copied the application files to /Applications/Xcode.app/Contents/Applications/ so they are listed under Xcode->Open Developer Tool.

• Create a new blank file with the Screensaver template. Delete everything except for the "Clear" panel. You can also start with a totally empty window and drag "Clear" from the Patch Library to the work area.

  

• Save it under /Users/your-user/Library/Screen Savers to make it available for you only, or /Library/Screen Savers to make it available for all other users. Doing the latter, you'll have to enter an admin password.

• Then, select it in System Preferences under "Other".

And there you go, a simple black screensaver.

Alternatively, you could of course just put the monitor to sleep, or let it display a folder of pictures, which only has one black picture inside.

Simple is best for me.

Place this flat black image in a folder and set that folder as your screensaver source for the Classic screensaver style.

Just get this one, it worked fine for me on 10.6 and now on 10.7:

There it is, THE REAL screensaver. Since this screen saver will only display a black blank screen it should actually save your screen. Of course, if you REALLY want to save your screen use the "Energy saving" settings in your system's preferences. Now featuring transparency! It's Freeware, so don't hesitate to Media:Blankscreensaverfolder120.zip download the 1.2.0 version (for Snow Leopard).