Customize Login Screen Wallpaper of Mac on OS Yosemite

Check tutorial of How to Customize the Login Screen Wallpaper of Mac in OS X Yosemite

So after a lot of requests from our users here is a guide about How to Customize the Login Screen Wallpaper of Mac in OS X Yosemite.

Customizing the look of the login screen on a Mac is a fun way to add some personal (or business) flair to the OS X login experience. Exactly how to change the login screen wallpaper has been constantly different in many versions of Mac OS over the years, but with OS X Yosemite, setting a custom wallpaper may be the easiest it has been in a long time .

Setting a unique login background in this way is simple and easy to undo too. You can change the background image to whatever you want, so if you have a photo handy that you want to use, that’s great, otherwise you can search our wallpapers section for something that suits you.

Back up your Mac with Time Machine before you start, although this is a minor change, you still want a fresh backupup in case you screw something up in some way up.

Change the login screen background wallpaper to a custom image in OS X Yosemite

For this walkthrough, we’re going to use one of the hidden wallpapers in OS X from a Cosmos Moon / Earth image. That secret wallpaper selection in OS X offers a lot of great options to use on any Mac, and the files are already properly sized.

Whatever image you want to set as the login background must be a PNG file and must be at least the size of your screen resolution, if not larger.

  1. Open the image you want to set as the login background in the Preview app of OS X
  2. Open the “File” menu and choose “Save As”, select PNG as the format and name the file “com.apple.desktop.admin.png” – save it somewhere on the desktop for easy access.
  3. Save a wallpaper as PNG with the correct name to set as the login background image

  4. Now go to the Finder of OS X and hit Command + Shift + G, enter the following path in Go to folder:
  5. / Library / Caches /

  6. Locate the file called “com.apple.desktop.admin.png”, select it and hit Command + D to make a copy or drag it somewhere like your user folder and make a copy that way (this will serve as a back-up from the default login screen background image – don’t skip this)
  7. Back upup from the background of the default OS X login screen, then copy your custom image into it

  8. Now copy the version of your custom wallpaper named “com.apple.desktop.admin.png” from the desktop to the / Library / Caches / folder
  9. Close the / Library / Caches / folder and log out of the current user account to see the change

modified-login-screen-image-osx

Your newly customized login screen background image will be set and you will see it again on the new login screen, you will see this image when you log out a user, boot to the new login screen, or lock the screen for login verification window. You don’t have to restart the Mac to see the difference.

For an added customization bonus, don’t forget that you can also add a message to the OS X login screen, this is a good place to post a statement of ownership or message, maybe even a phone number or email address to identify who owns the specific Mac.

You probably want to keep a copy of “com.apple.desktop.admin.png” handy, unless you are really excited about your newly customized login screen, that’s up to you. To undo the adjustment, you just want to move the backed up copy back to the original location in / Library / Caches /, as you can see in the screenshot above, the backupup just kept in the same folder for this particular walkthrough.

Set the custom login background with Terminal

If you’re sensible with the command line, you can get the same results with the following, assuming you have a PNG file handy:

Move the original login background file to be used as a backupup file: mv /Library/Caches/com.apple.desktop.admin.png ~ / Desktop / backup /

Move the new image into place to set as the new login screen background image: mv ImageForLoginWallpaper.png /Library/Caches/com.apple.desktop.admin.png

Log out to see the change as usual.

For Mac users with an earlier version of OS X, setting up a custom login screen in OS X Mavericks is also quite easy.

So awesome tip was discovered on LifeHacker, cheers to the find.

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How to Customize the Login Screen Wallpaper of Mac in OS X Yosemite: FAQ

Tutorial Summary: How to Customize the Login Screen Wallpaper of Mac in OS X Yosemite

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What is actual time in which this method complete?

The time to complete the How to Customize the Login Screen Wallpaper of Mac in OS X Yosemite tutorial is 10+ minutes.

What are the supported Device?

Apple

What are the supported Operating system?

mac OS


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