Monterey Login Screen is Stuck on Chroma Red (different than the Pink Monterey Valley screen!)
There seem to be two divergent problems emerging from the Login Screen with Monterey Pink Valley.
This came up in the thread below and it seems to be different from the OP, "Can I change login screen with OS Monterey" and similar threads where I first saw that I wasn't the only person with the problem.
On our shared case, the system's login screen has been locked into the "Chroma Red" screen as shown below.
Unlike other similar requests for assistance, this login background cannot be changed back to the [comparatively more soothing] Monterey Pink Valley or when following the guidance on the thread to a customizable background.
This includes the following remedies.
For personalization using your own image, this approach isn't working.
- System Preferences > Users & Groups.
- Open lock to make changes.
- Right click on user in left column > Advanced Options.
- Copy UUID value.
- Go to /Library/Caches/Desktop Pictures.
- If it doesn't exist create Desktop Pictures folder.
- Inside Desktop Pictures create folder with UUID value as name.
- If it exists, just open folder and put the picture you want in it and name it as "lockscreen.png". It has to be a .png picture.
- Then close folder and right-click on folder > Get Info.
- Open lock to make changes.
- Grant permission to Read & Write to user, admin, everyone.
- Close lock
- Open System Preferences >FileVault and disable it.
- (The new startup screen will work.
- Restart computer
- If you enable the File Vault again, the startup screen won’t work anymore.
For an alternative approach, this approach below also is not working.
- Under "Security and Privacy," Turn of File Vault
- Under "Users & Groups"
- Guest User is disabled
- "Display login in the users & groups preference pane you have a window as List of users" checked, and not checked "name and password".
Hopefully separating the two problems out will facilitate helping both problems.
Cheers,
Bill
