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Background For Mac



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By default, the Mac login screen shows a blurred version of your desktop’s background. While this blurred version of desktop background often looks very nice, there are users who want to change Login Screen Wallpaper on Mac with Photos and images of their own choice, in order to personalize their Mac.

Change Login Screen Wallpaper on Mac

Your current Login Screen Background image is an image File (com.apple.desktop.admin.png) located in the Caches Folder on your Mac.

In theory, it should be possible to Change Login Screen Wallpaper on Mac by deleting “com.apple.desktop.admin.png” from within the Caches Folder and replacing it with another image File with the same name.

However, this does not work on Mac and you may end up losing your current Login Desktop Background, in case you happen to delete the existing “com.apple.desktop.admin.png” File on your Mac.

Hence, it is strongly recommended not to delete the existing “com.apple.desktop.admin.png” file in the Caches Folder and exactly follow the steps as provided below.

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  1. Make Two Copies of Current Login Screen Wallpaper
  2. Update Current Login Screen Wallpaper File (Copy) with New Image
  3. Replace Current Login Screen Wallpaper File in Caches Folder with updated Login Screen Wallpaper File

Make Copies of Current Login Screen Wallpaper

Login to your Admin Account on your Mac and follow the steps below to create two copies of your current desktop login screen wallpaper located in the Library Folder of your Mac.

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1. Click on the Finder icon in the Dock of your Mac to launch the Go Menu in the top menu bar of your Mac.

2. Next, click on the Go option in the Go Menu bar and then click on Go to Folder… option in the drop-down menu (See image below).

3. In the Go to Folder window, type /Library/Caches/ and then click on the Go button or hit the Enter key on the keyboard of your Mac (See image below).

4. From the Caches Folder, copy the File named com.apple.desktop.admin.png onto your desktop and also to any safe Folder on your Mac.

Note: In case you cannot find this file, make sure that you are logged-in to your Admin Account.

Important: Make sure that you make two copies of “com.apple.desktop.admin.png” File. The extra copy is required, in case you want to go back to your current or default Login Screen Background.

Update Current Login Screen Wallpaper File (Copy) With New Image

After making two copies of your current Login Screen Background Image File, the next step is to update the Desktop copy of your current Login Screen Background Image File with a Photo or image of your own choice.

1. Find the image that you wish to set as your new Login Screen Wallpaper

2. Once you have located the image, double click on the image in order to open it in the Preview App.

In case Preview is not your default photo viewer, right-click on the image and then click on Open with Preview option in the menu that appears (See image below).

3. After the image opens, select the entire image by dragging your mouse from the top left corner of the image to the bottom right corner of the image (See image below)

4. After selecting the entire image, press Command + C keys on the Keyboard of your Mac in order to copy the image to clipboard.

5. Now, open the copied com.apple.desktop.admin.png File located on the desktop of your Mac by double clicking on it and press Command + V keys on the keyboard of your Mac to paste the image from the clipboard (copied in step #4 above) to this File.

6. Once the New image is pasted, rearrange and resize the image as required and close the window.

Replace Current Login Screen Background Image File in Caches Folder

Finally, it is time now to replace your current Login Screen Background Image File in Caches Folder with the updated Login Screen Background Image File as available on your desktop in order to change Login Screen wallpaper on Mac.

1. Make sure that Caches Folder is open – If not, you can repeat steps 1,2,3 as provided above in section “Make Copies of Current Login Screen” to open the Caches Folder.

2. Next, drag the updated com.apple.desktop.admin.png File located on the desktop of your Mac into the Caches Folder.

3. You will see a pop-up, click on the Replace option in the pop-up to replace your current Login Screen Background Image File with your own Photo/image (See image below)

4. Logout of your Mac and you should see the New Login Screen Background on your Mac.

Change Login Screen Wallpaper Back to Default on Mac

In case you do not like the New Login Screen Wallpaper, you can change it back to the default Login Screen Wallpaper at any time by following the steps below.

1. Click on the Finder icon in the Dock of your Mac to launch the Go Menu in the top menu bar of your Mac.

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2. Next, click on the Go option in the top Menu bar of your Mac and then click on Go to Folder… option in the drop-down menu (See image below).

3. In the Go to Folder window, type /Library/Caches/ and then click on the Go button to open the Caches Folder on your Mac (See image below).

4. Now, drag the Backup copy of the original Login Screen Background image File (com.apple.desktop.admin.png) into the Caches Folder.

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5. You will see a pop-up message, click on the Replace option in the pop-up to replace your current Login Screen Background image with the original Mac default Login Screen Background image (See image below)

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6. Logout of your Mac

This time you will see the familiar Mac Default Login Screen Background on your computer.

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You can change your Mac desktop background to one of Apple's preloaded options from the 'System Preferences' menu.You can also set one of your own images, or a folder of images, to use as your desktop background.You're also able to quickly set an image as your desktop background by right clicking it and choosing the option.Visit Business Insider's homepage for more stories.Not in love with Apple's customary mountain range, or night sky wallpapers? No problem! It's quick and easy to give your Mac a customized look by changing the desktop background image to something you prefer. You can select from a variety of other options already loaded by Apple, or use one of your own photographs. Whatever you choose, you can freshen up your look now by following the simple steps below.How to change your background picture from Systems PreferencesYou can set your desktop image to one of a variety of options that Apple has already preloaded onto your Mac:1. Open the Apple menu and select 'System Preferences.' It may also be pinned to your dock (it's a grey gear).2. Click on 'Desktop & Screen Saver.'3. On the left side of the Desktop panel select the Apple drop down and click on 'Desktop Pictures.'4. You can now choose the picture you want to use as your background image. You can also have the image change at regular intervals by ticking the 'Change picture' option at the bottom of your page, then set the time interval from the drop down box. The background will go through all the photos in the 'Desktop Pictures' folder.If you want the order to be shuffled, then tick the 'Random order' option box at the bottom of the page. Depending on your Mac OS version, you may be able to choose a 'Dynamic Desktop' image. The 'Dynamic Desktop' options will automatically change your desktop image based on the time of day. You can also choose to use your own photos for the desktop background:1. To use photos in your Photos app or Pictures folder, you can use the drop down option on the left side of the panel or you can add another folder by clicking the + in the bottom left corner.2. Now, choose the location of the folder that contains the photo, or photos you want to use.3. You can now select the photo you want to use from the options displayed, or select the 'Change picture' option to have the background image cycle through all of the images in your selected folder. The time between changes can be set from the drop down menu and you can have the order shuffled by ticking the 'Random order' box. If you use multiple displays, you can also set a different image for each screen.How to change your background from the Photos appYou can also set the background from the Photos app, without having to go through 'System Preferences':1. Open the Photos app. If you're using multiple displays, make sure that the Photos window is on the display that has the desktop you want to change. 2. Find the image you want to use and right click (or Ctrl+Click) on it.3. Select 'Share' and then 'Set Desktop Picture.'How to change your background from FinderInstead of using the Photos app, you can find the image through Finder.1. Open Finder and locate the image you want to use.2. Right click (or Ctrl+Click) on the image and select 'Set Desktop Picture.'Note: You can also use this method on a photograph you find on the internet, as long as you save it onto your Mac first.How to change your background by dragging and dropping an image onto your desktopThere is a fast shortcut to set any image as your desktop background. 1. Drag and drop the image onto the desktop you want to change.2. Right click (or Ctrl+Click) on the image and select 'Set Desktop Picture.'This is a great way to use an image that you've received through email or iMessage, or a screenshot (which will automatically save to your desktop) you've taken.Related coverage from How To Do Everything: Tech:How to zoom in and out on any Mac computer, using a keyboard or trackpadHow to uninstall apps on a Mac computer in three different waysHow to create folders on a Mac computer and organize your filesHow to change your Mac computer's password, or reset it if you've forgotten it