How to Change the Login Screen Background in macOS Big Sur for Admin or Guest

Last Updated on Dec 31, 2020

here’s the tutorial on how to change Mac login Backgroud Picture or “Enter password” Screen Backgroud with your Wallpaper. Apply this Change to Admin login and Multiple user accounts on Mac. Also, I cover the troubleshooting solutions in the last of these articles like the New picture is not showing on the login background or unable to use this feature for Other User accounts on the same Mac, MacBook, iMac, Mac Mini, iMac Pro [Intel & M1 Apple Silicon Macs], iMac Computer.

Before getting started, here’s a short overview of what you should be required under Pre-Requisite and how to do it with simple steps. These tricks tested and work on Big Sur Mac and MacOS Catalina, Earlier macOS users can’t follow the same steps. here’s the tutorial on how to change on MacOS High Sierra, How to Change on MacOS Mojave.

Pre-Requisite:

1. we can change the startup screen wallpaper or login wallpaper only from the Admin Account for admin or Other accounts on the same Mac.
2. UUID Number for Create folder with UUID Folder if not created.
3. One HD Picture in png format: That you Want to Set on Login Background
4. FileVault is deactivated on your Mac

Step to Change Big Sur Login Screen Background on Mac

1. Open Finder on Mac, From top Menu, Click on Go > “Go to Finder“.
   

   Go to Finder on Mac

2. Copy the Below path and Paste it to move under Desktop Picture > “Go“.
   1. • /Library/Caches/Desktop Pictures
        

        Find Desktop Picture folder for login background on Mac

3. Here’s the folder that’s named with the UUID number. if already there then you don’t have to create a folder.
   

   Desktop Picture folder with UUID name

   • • if the UUID folder is not there, then create a Folder using the Below steps,
   • a) Go to the Apple logo from the top Mac Menu, And Click on the System Preferences option.
     

     System Preferences on Mac

   • b) Next, Go to the Users & Groups option.
     

     Users and Groups on Mac

   • c) Click on the lock icon to make changes on the users, and Enter the Mac Login password to unlock.
     

     Unlock Users and Group on Mac

   • d) Right-click on Profile name and click Advanced Options..
     

     See Advance Options for Users on Mac

   • e) Here’s the UUID number, Select it and Copy the number,
     

     Copy UUID number from System settings

   • f) and Create a Folder with the name UUID number.
4. here’s the image name, Lockscren.png, Change the default name and give a name like oldlockscreen.png
   

   Rename Existing Picture on mac desktop

5. Move your Picture under this folder with the name, “lockscreen.png”, Drage under this folder or Copy/Past it here.
   

   Move new Lockscreen picture on Finder folder

6. Your Mac will ask to enter a login password.
   

   Apply changed by verify password

   Note: Verify the folder is access by admin with Read & Write permission. Right, Click on Folder name > Get info. then, the last access section is Given to Read & Write Permission. to change here, unlock the settings from the bottom lock icon.

   

   Remove the Restrictions of Folder for use as the Login screen

7. Now, Restart your Mac. Restart must be required to apply these changes.

Change Login Screen Background on Guest Users or Multiple Users on Mac

How to change Login Screen Backgroud for Multiple Accounts on Mac? Does it work?

Still, I have the solution to change Login Backgroud if your mac has multiple users. Otherwise, Guest and Other Restricted users on the same mac can’t apply these settings to change the Login screen picture as a Background.

Wallpapers are user-specific. so follow the below steps for Other users on the Same Mac from Admin login.

1. log in to Your “Admin account” on Mac. Open Finder on Mac, From top Menu, Click on Go > Go to Finder.
   

   Go to Finder on Mac

2. Enter the below path and move to the Desktop Pictures folder. And Click on “Go” button.
   

   Find Desktop Picture folder for login background on Mac

   • /Library/Caches/Desktop Pictures

3. Here’s the Restricted folder with Red Mark for Guest users or Other users that we can’t open,
4. Folder names with your Guest User’s UUID number, Just Copy this number and Rename it.
   

   Copy UUID number and Create a new folder with same name

5. Now, Create a New Folder in the same place, Enter the password create, and Give the folder name,
   

   Create a new folder for Desktop Login screen another account

6. by paste the name on the folder. Here’s the New Folder for another user.
   

   Rename the old folder and create a with the same UUID number

7. Open this folder and add a png image with the name: lockscreen.png
   

   Move lockscreen picture to a new folder

8. Right-click on Fonder > “Get info” and Allow permission to Read & Write after unlocking the lock.
   

   Remove folder restrictions

9. That’s it. Restart your Mac and see the changes on your Guest login screen.

Troubleshooting:- Customize Startup Screen Mac

• Restart is Required: Applied changes we can’t see direct from lock screen option under top apple logo. Go to the Apple Logo from top Mac Menu > Restart.
• Change Login Background wallpaper is not applying for other users or multiple accounts [We can apply using the above steps].

Change Login Picture on Mac and MacBook Login Screen

On the Login window, change the picture that appears next to your account name, Either a single account or multiple user accounts. These settings we can apply from a particular login.

1. log in to your Mac account and Open System Preferences from the top Apple logo on Mac Menu.
2. Go to the Users & Groups option.
3. Unlock the lock showing on the window, and Select the Account for that you want to change a picture,
   

   Change Profile picture of login screen on Mac

4. Click on the Edit button showing on Picture or Drage Picture on it. to apply with some customizations, like zoom in or zoom out.
   

   Resize profile picture of the mac login screen

5. Click on the Save button to apply the changes.
   

   Profile picture changed on mac login

6. That’s it,

For other Login on the same mac, log in your account for a particular account and follow the same step.

I hope you get the complete solution on changing the Mac Login screen background for a single account and multiple users account. then Change Profile picture of account on Mac that appear next to the Account name. for more help comment me.