Solution for changing Big Sur login wallpaper to custom.

Just sharing a solution I've found on Stack Exchange. Credit to whoever discovered it.


  1. System Preferences > Users & Groups.
  2. Open lock to make changes.
  3. Right click on user in left column > Advanced Options.
  4. Copy UUID value.
  5. Go to /Library/Caches/Desktop Pictures.
  6. If it doesn't exist create Desktop Pictures folder.
  7. Inside Desktop Pictures create folder with UUID value as name.
  8. Right click on folder > Get Info.
  9. Open lock to make changes.
  10. Grant permission to Read & Write to user, admin, everyone.
  11. Make sure FileVault and Guest user are deactivated.
  12. Change desktop wallpaper.
  13. Restart computer.


Big Sur will now always create a lockscreen.png file in the UUID folder matching the current wallpaper.


Tested on a 2018 MBP and works perfectly.


Enjoy!

MacBook Pro 15″, macOS 11.0

Posted on Nov 17, 2020 1:46 PM

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Posted on Jan 12, 2021 10:13 AM

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490 replies

Nov 26, 2020 9:05 AM in response to rob185

Ha, Rob185! Exactly, and I think they will fix it given the amount of customer reaction. It may be times gone by when Apple ran the 1984 ad and the Apple customer was someone who, by their nature, did not want to be cookie cutter identical to an IBM or HP concept of PC. I think they are still responsive to their customers ‘ wishes and have hope. But it would be really funny to see HP run an ad with “Mac” as a fat old guy wearing golf shorts in that Big Sur pattern playing on an oceanfront course, and “PC” is an athletic young guy who says “I think you know my grandfather.” LOL, I date myself remembering these old Apple ads.

Nov 27, 2020 9:34 AM in response to Soren Pearson

I think Soren is right. Just in case you need more detail, I found the following route (someone else may know of a shorter route):

  1. In the upper right, click on "my subscriptions."
  2. In the upper left, click on "Filter."
  3. On the left, under "Recent Activity," Select "Participated." That will give you a list of the threads in which you recently posted something.
  4. Find the thread you want to "unfollow" and click on the + to the right of that thread.
  5. Click on the button that says "Following." That should unfollow it. If you click on it again, it should give you the option to "Follow," so you will know you have unfollowed it.


I hope that works if the button on the discussion page itself is not working for you. Again, I'm very sorry for my venting if that is the problem. I won't post any more on this thread as I'm sure it must have become annoying.

Nov 27, 2020 7:32 PM in response to Glennly

It looks like you’ve tried some good guesses for multi-user systems, Glennly.


Yes. The procedure given in this discussion strictly changes the lockscreen of a single user, but that is sufficient, when the system is recognized as a Single-User system; in which case, the Loginscreen is “skipped” for the Lockscreen of the sole user of the system.


The question, unfortunately, remains: where can one set a replacement Loginscreen for a multi-user system?


I wouldn’t be surprised if it is not to be called lockscreen.png, but something else.


Your idea of using the Default User was a good one.


It may not be intended to be within any user’s directory. Or, maybe, the Root User’s directory?


Just some brainstorming, there.

Dec 6, 2020 9:01 AM in response to arizonanorse

Hi Soren

I was not looking at the right directory, I switched to the entire Mac drive the UUID world was already there

but does not contain the grotesque Big Sur lock screen image.

I created a new UUID and renamed it again placed a new image in put it still comes up with the ugly Lock Screen image

apparently I have two desktop picture folders with the same UUID the first what that has lock screen is my old lick screen. I still have the Big Sur ugly abstract vector image?

please advise.

thank you

James


Dec 6, 2020 9:03 AM in response to arizonanorse

here are the screen shots

Hi Soren

I was not looking at the right directory, I switched to the entire Mac drive the UUID world was already there

but does not contain the grotesque Big Sur lock screen image.

I created a new UUID and renamed it again placed a new image in put it still comes up with the ugly Lock Screen image

I have two Desktop Pictures folders with same UUID,


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Solution for changing Big Sur login wallpaper to custom.

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