How to modify the OS X Lion login background picture

Friends who have just started to touch the apple system often ask me when I log in to the system the background image is too monotonous,

Can I modify this background picture? At the beginning I am not very familiar with the query related information found in fact also very simple, now share to everyone.

First of all, you must know the screen resolution of your computer's monitor, if you don't know, very simply, turn on System Preferences – Select (monitor) and you will be able to see the maximum supported resolution of your monitor.

Second, you have to find a picture of your own liking, of course, the resolution of the picture is the same as your display resolution, such as 1280*800.

Again, all you have to do is change the suffix name of the picture you like, and rename it to Nstexturedfullscreenbackgroundcolor.png.

In the end you'll need to back up the path as follows: Double-click on your Mac hard drive icon-open the files under the System Folder/resource pool/library/frameworks/appkit.framework/versions/c/resources with the same name.

After the backup is good, delete the original file and copy the background of the picture you just modified.

Just come and try, isn't it cool?