Mac OSX: Changing Login Screen Desktop Picture

It would look odd whenever you lock your screen (showing Login Window) it will show the default desktop picture instead of your customized desktop picture. To change the default desktop picture, you will need to know where your picture is stored. Open the terminal from Application>Utilities and type the following:

  • cd /System/Library/CoreServices
  • sudo mv DefaultDesktop.jpg DefaultDesktop_original.jpg
  • sudo cp Path/image.jpg DefaultDesktop.jpg
Thats it! you've just renamed the original desktop picture used in Login Windows to DefaultDesktop_original.jpg and copied your image from Path\image.jpg as DefaultDesktop.jpg. Have fun!