How to replace the OS X 10.11 System login Interface Wallpaper

In OS X El Capitan, you can easily replace the wallpaper (enter the login password interface) of the system login interface. The current default system login screen wallpaper is a "blur" of desktop wallpaper, which makes the wallpaper of the system login interface more clear by customizing.

Preparation: Prepare a wallpaper for screen resolution

1. Open the target picture through "preview" and save it as a PNG file. The method is: file-export, and then select PNG format.

2. Named "Com.apple.desktop.admin.png" (double quotes not).

3. The next step is to replace the original wallpaper:

A. Press Command+shift+g to call out "go to Folder" and enter the following path:/library/caches/, click to go.

B. For insurance purposes, make a backup copy of the original wallpaper (change the name).

C. Put the newly modified wallpaper file into this folder.

It is so simple that you have successfully replaced the original login screen wallpaper. If you want to see a new wallpaper, restart your Mac after you have it.