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Question: 1013.1 Image before sign-in is NOT in focus

Everything else is fine. Mac 27 inch late 2013

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You mean this?

User uploaded file


That's by design... guess Apple thinks it's cool or something.


You can replace it by doing the following:


Find the non-blurry version in: /System/Library/CoreServices/DefaultDesktop.jpg. If you use a custom wallpaper then just find that file instead.


Open it in Preview. Go to Tools > Adjust Size and make it 2880 x 1800. Then go to File > Export... and save it as PNG. Name it com.apple.desktop.admin.png.


Now open the folder: /Library/Caches, and paste the file there to replace the blurry version. The next time you start up, you should see the clear version now.


To prevent the system for overriding the changes, you can run the following Terminal command. Terminal is located in /Applications/Utilities.

chflags uchg /Library/Caches/com.apple.desktop.admin.png


To unlock the file again if you choose to do so later, open Terminal and type:

chflags nouchg /Library/Caches/com.apple.desktop.admin.png

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Nov 13, 2017 5:28 AM in response to johnparks In response to johnparks

You mean this?

User uploaded file


That's by design... guess Apple thinks it's cool or something.


You can replace it by doing the following:


Find the non-blurry version in: /System/Library/CoreServices/DefaultDesktop.jpg. If you use a custom wallpaper then just find that file instead.


Open it in Preview. Go to Tools > Adjust Size and make it 2880 x 1800. Then go to File > Export... and save it as PNG. Name it com.apple.desktop.admin.png.


Now open the folder: /Library/Caches, and paste the file there to replace the blurry version. The next time you start up, you should see the clear version now.


To prevent the system for overriding the changes, you can run the following Terminal command. Terminal is located in /Applications/Utilities.

chflags uchg /Library/Caches/com.apple.desktop.admin.png


To unlock the file again if you choose to do so later, open Terminal and type:

chflags nouchg /Library/Caches/com.apple.desktop.admin.png

Nov 13, 2017 5:28 AM

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User profile for user: johnparks

Question: 1013.1 Image before sign-in is NOT in focus